Mare Bello Fiore

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Introduction Relationships Abilities and Powers

Mare Bello Fiore
Personal Information
Japanese	マーレ・ベロ・フィオーレ
Romaji	Māre Bero Fiōre
Korean	마레 벨로 피오레
Chinese	马雷・贝罗・菲欧雷
Epithet	Untrustworthy Disciple of Nature
Age	76
Gender	Male
Height	104cm
Race	Human Race Dark Elf
Affiliation	Great Tomb of Nazarick
Family	Aura Bella Fiora (Twin Sister)
Occupation	6th Floor Guardian
Residence	Great Tomb of Nazarick Gigantic Tree on the 6th Floor
Karma	Negative 100: Neutral~Evil
Creator	Bukubukuchagama
Media Information
Japanese VA	Yumi Uchiyama
English VA	Megan Shipman
Light Novel	Overlord Volume 1
Manga	Overlord Chapter 1
Anime	Overlord Episode 1

"Same...same sixth Floor Guardian Mare Bello Fiore, at your command."

— Mare's Introduction

Mare Bello Fiore (マーレ・ベロ・フィオーレ) is a dark elf and one of the twin Floor Guardians on the 6th Floor of the Great Tomb of Nazarick. Mare is the twin brother of Aura Bella Fiora. Alongside his sister, he was created by Bukubukuchagama.

Appearance

Mare is a child with dark skin and pointed ears, a signature trait of the dark elves. He has golden hair and heterochromia, his right eye is blue and his left eye is green.

He wears a blue dragon scale leather full-body suit, covered by a white and gold vest embroidered with the sigil of Ainz Ooal Gown and a forest green-leaf cloak. Below, he has a matching short white skirt exposing his thighs, and on his neck is an acorn necklace emitting silver light. His slender hands are donned with shiny white silk gloves and he wields a twisted black wooden staff.

People outside of Nazarick always mistake him for a girl, due to how he looks appearance-wise and the clothing he mainly wears.

Personality

Mare has a shy and cowardly personality, the kind which is a polar opposite to his sister, Aura. He often stutters when speaking and maintaining a subservient demeanor during conversations. This, however, is only an outward guise and does not affect his loyalty to Ainz or his ability to carry out his duties, no matter how cold-blooded they may be. Mare likes to sleep all day and is fond of reading books from Nazarick's library, Ashurbanipal, instead of talking with others. He is comprehensive of how his sister feels without her needing to say a word, knowing whether she is having a bad mood or not. He is also appreciative of the time and effort put forth by Ainz's New World followers, showering those like the lizardmen compliments for showing their loyalty to his master with offerings. He also dislikes dragging out the conversation with other Nazarick denizens like Pulcinella for too long, seeing that everything the latter tells him is uninteresting. If an opportunity presents itself in the conversation, he would tried his best to hurriedly change the topic of their discussion before it goes on for any longer than it already is.

Unlike his sister who has an interest in collecting beast species, Mare takes a keen interest in collecting plant species. Mare is also observant of his master's movements to the point that he can't help but openly lavish praises for Ainz during their times spent together between them. When Ainz gave his reason for staying with the NPCs, he was shown to appear very emotional and tearful around his master. It was to the point he indirectly got servants of Nazaricks like one of the Homunculus Maids to speak on his behalf while he is crying uncontrollably until Ainz calms him down. This goes to show that Mare's feelings are relatable and understandable by servants who wish to convey them in his stead. He was reluctant on the idea of executing actions independently on his own without first seeking permission from Ainz ahead of time. He dislikes the thought of being scolded by Ainz by acting against his master's orders unless it is his creator making the decision for him. He was adamant and determined to not let anybody undermine the uniqueness his creator granted to him, going as far as to voice that vow loudly. On the other hand, he would kindly admonish his sister's words if it is out of line especially towards Shalltear.

Background

Mare was created to be the brother of Aura by his creator Bukubukuchagama. The reason why Mare is so submissive to Aura stems from how his creator wants that sibling-type relationship to be. Since she apparently believed that the younger brother should obey the elder sister, it was Mare's duty to listen and heed the words of Aura even when they are partnered and paired together during missions assigned by Ainz. (Gag between Peroroncino and Bukubukuchagama).

Whenever they had to visit the other Floor Guardians for fun or do other things, Mare and his sister would always inform one another where they were headed. That was because the two are assigned to guard their Floor together by order of the Supreme Beings.

As Mare tend to stay in the Amphitheater for the time being, it was the duty of his sister to go patrol the forest in the meantime. If he intends to leave the location, it was Mare's job to report to Aura ahead of time before proceeding further.

Chronology

The Undead King Arc

Main article: The Undead King Arc

When Momonga teleports to the 6th Floor and enters the Amphitheater while being greeted by his sister, Mare had his presence noticed by his master. Mare was told by his master to show himself to the latter. Realizing Mare is not heeding to his command, the elf was called out by Aura to also pay his respects to their master. When Mare takes too long to respond to protocol, his sister gets angry and begins scolding him for his inability to act quick on his feet. Feeling threatened by sister's threats physically, he gathered up his courage and confront Momonga, shortly later apologizing to his master for the long wait he had caused. According to Aura, Mare felt scare and afraid in the presence of his master. While Aura converses with her master about wishing intruders can invade their floor, Mare voice his fear by not wanting them to come. This in turn, forced Mare to be taken away by his sister to have a brief, private discussion and scolding him for what he says. Mare was on his knees in front of Aura, who was hurling a torrent of abuse at him, only to be stopped by Ainz who wanted his sister to forgive him.

Wondering why Momonga has come to his floor, Mare was shocked to hear that he is planning to do some training along with performing experiments while using both his magic and his guild weapon. When Momonga asks Aura if she wants to fight his summoned Primal Fire Elemental, his sister accepts happily. Although Mare was delighted to hear from his master they will get to see the power of the guild weapon, he wasn't very fond of the idea on fighting and testing the entity out himself. During the summoning of such monster, he was being protected and shielded by her sister's own servants, the Dragonkins from the elemental's fire effect that was unleashed along the way. After it was summoned, he refuses to go along with her sister's acceptance to fight by attempting to excuse himself and flee the scene that was about to unfold. In the end, before he can even get the chance to make his escape, Mare was enthusiastically dragged off by his sister to join and assist her in the battle. After he and his sister defeated the elemental, Mare returns back to Momonga's side while feeling somewhat exhausted and tired.

As a result, Mare was given a drink of water from his master appreciating the hard-work he have put forth while fighting the elemental with his sister. Mare thanked Momonga for his act of benevolence towards him and his sister, coming to the realization that their master was not as terrifying as he had initially thought to be.

Once the other Floor Guardians arrive at the Amphitheater, he later joins them in a formal salutation towards Momonga. Together, they collectively pay their respects and admire the powerful presence their master has. Additionally, he was asked a question by Momonga of what to do to conceal the Great Tomb of Nazarick, Mare suggests covering the walls in mud and plants together as a way to camouflage it. When Momonga asked confirmation from Mare if utilizing heaps of dirt to conceal the walls is workable, he believes that it should be possible as long as he was given permission by the latter to do so. Hence, it was decided by Ainz that Mare and his sister Aura will be given the task of piling up the dirt from the nearby land close to Nazarick to make dummy hills as camouflage. Alongside his sister, Mare was allow permission to use any resources from other floors in Nazarick beside their own to help them with the task at hand.

Since the meeting was over and Momonga have left their vicinity, Mare was the first to voice his thoughts on how scary their master's Despair Aura was. When Mare was questioned by Demiurge about breeding children for the sake of Nazarick, he felt dumbfounded and flabbergasted on how to respond. Nonetheless, he regains his composure quickly enough to say that he will do whatever he can to help his master to make that happen at some point. Mare was promised by Demiurge that he will one day teach the elf on how to make children. Mare was also advised by Demiurge not to conduct breeding experiments on his own without their master's permission, considering the operations in Nazarick are currently running smoothly at the moment. Mare agrees with what his colleague says, believing that increasing their numbers in Nazarick right now wouldn't do any good for them. While so, Mare informs Demiurge that the reason why he was dressed this way is due to his creator's decision of turning him into a trap.

Later, Mare recruited several undead and golems to help him on his current task. According to Momonga who was watching from afar, it appears Mare is camouflaging the walls of Nazarick with his magic. Demiurge noted that Mare's workload is only going to continue increasing further now that some gaps will be left after moving the earth, which will need to be filled with plants. Shortly thereafter, Mare ended up spotting his master and met up with him to talk about the work have done to ensure the security of Nazarick. After some complicated exchange of words back and forth concerning the reward decided by Momonga, Mare finally accepted the Ring of Ainz Ooal Gown that was handed to him by his master. Moving forward, Mare promised Momonga that he will worked harder than before so that his master will not be disappointed by him. On the other hand, Mare was informed by Albedo who arrive later at the scene to tell him that their master was dressed in armor to make sure that the former wouldn't have his duty disturbed and interrupted while he worked. Not only that, but Mare was also advised by Momonga to take a break before he continues the camouflage work after which the former complies to do.

The Emissary of the King Arc

Main article: The Emissary of the King Arc

Mare is shown sleeping when a messenger from Ainz comes to the 6th Floor. Having been awoken by Aura, he quickly gets out of bed to greet the Death Knight who has already been shown in by his sister. Upon hearing the undead's questions from their master, Mare, like his sister, is confused, but nonetheless believes Ainz has a reason. On their interpersonal relationships, Aura answers for Mare, stating he is a bookworm and hardly goes out. She berates him to make friends, to which Mare meekly agrees. He is recommended by Aura to start with the librarian, Titus Annaeus Secundus since they have similar interests. On the topic of their desires, Mare wants some plant monsters to raise to protect the floor, as opposed to Aura wanting a new magical beast.

The Guardians' Vacation Arc

Main article: The Guardians' Vacation Arc

When Ainz suggested the Guardians take a vacation, Mare was deeply troubled and confused by his master's suggestion. Having not the slightest clue how to handle his break time, Mare pleaded Ainz to tell him a way of how to spend their rest days off. Mare thought that perhaps the reason behind why Ainz is giving him some to take a break and rest was because he failed his master.

While spending his time with the Guardians in private, Mare brought up the health exam the Supreme Being Herohero once spoke of doing. Since Herohero was an Elder Black Ooze, he was unsure what the Supreme Being's internal liver organ would look like, assuming the slime had one in the first place. Near the end of the conversation with them, Mare promised the other Guardians that he will continue working his hardest and be of use to everyone in Nazarick.

The Dark Warrior Arc

Main article: The Dark Warrior Arc

Before heading to E-Rantel, Ainz had order Mare and his sister to scout the Great Forest of Tob so that can ensure the safety of the Great Tomb of Nazarick and collect information. Because of this string of tasks, Mare, Aura, the vassals designated for construction, and other powerful entities had invaded the forest and disrupted the balance of power within it.

The Bloody Valkyrie Arc

Main article: The Bloody Valkyrie Arc

Ainz orders Mare and Albedo to eliminate Kralgra to keep the affair a secret. Mare uses his magic on the forest so that no one can escape. After having already killed the first person, Mare dragged the corpse behind a tree before proceeding to his next target Igvarge. He immobilizes his second target, Igvarge and kills him by crushing the man's skull with his staff. Although he doubts his performance with how the adventurer was killed brutally, Mare was happy to know from Albedo that their master Ainz will surely be happy for what he did to the man.

Shortly thereafter, he would help Albedo to bring the corpses of Kralgra back to Nazarick. He and his sister accompanied Ainz to a location that happens to be nearby to where Shalltear was positioned at before they part ways with their master to carry out their tasks.

As Ainz proceeds to engage Shalltear in a death battle from then onward, one of such tasks Mare and his sister have been ordered to do was to carefully monitor the area from afar. Having been given legendary items, he and Aura are given the additional order of withdrawing if the enemies who are responsible for brainwashing Shalltear appear.

Once the fight came to an end, Mare was informed by his sister that the victor of the battle was their master. Hearing this, he suggests they collect Shalltear's equipment drop after the battle to which his sister said their master had that already taken care of. Mare and Aura later head back to Nazarick as instructed since their task was now over.

After Ainz returns to Nazarick, Mare and the other Floor Guardians beg him to never get in harm's way again and to allow them to handle any future incidents that may come from now on. Although the other Guardians are advising Ainz to give Shalltear a harsh punishment, Mare instead suggested to his master that they are better off not being too strict on her. He considers removing all traces that remains in the battle, but Ainz suggests there was no need for him to do so because it would be used to fabricate an incident cause by the Sealing Crystal while fighting the vampire.

The Show Must Go On!

Main article: The Show Must Go On! Arc

Mare and Aura are seen together working in the Great Forest of Tob. Mare is confused as to what they are doing, to which his sister explains that she is building a second Great Tomb of Nazarick. Upon hearing her response, he becomes uncomfortable and is afraid that his sister is planning to secede with Nazarick. Aura denies his claim, but before she can explain to Mare, Ainz arrives through a Gate. To his relief, Mare learns that the structure Aura was building until now is simply a decoy base for Nazarick. At a meeting with Ainz and the Floor Guardians, he listens to his master's plan of implementing a fringe benefit system. Mare requests to create a sea on the 6th Floor of Nazarick.

The Sealed Evil Tree Arc

Main article: The Sealed Evil Tree Arc

Mare, alongside with the other Floor Guardians, are ordered to fight together against Zy'tl Q'ae and to secure the herb and to complete Ainz's adventurer quest from Pluton Ainzach.

The Lizard Man Heroes Arc

Main article: The Lizard Man Heroes Arc

After Cocytus lost the war against the lizardmen, he took part in a meeting alongside the rest of his fellow Floor Guardians concerning the former's defeat. During the meeting, he and his sister Aura both shed tears emotionally after seeing the way on how Ainz chose to forgive Shalltear for her betrayal. After the meeting is over and Ainz leaves, Mare shared his thoughts with the Floor Guardians. He speculates that maybe Ainz intentionally set Cocytus' expedition up to fail from the very beginning, considering why their master allowed Cocytus to used only weak undead.

Mare and the other Floor Guardians appear next to Ainz when he addresses the lizardmen. When his sister voice her disapproval of having their guests be brought into her construction, Mare was an exception among the Floor Guardians to not be entirely against her idea. While everyone nodded their head with Aura's reasoning in order to convince their master, Mare on the other hand, chose not to act accordingly like them and instead, wait for his master to make the final decision.

The Search for Hamsuke Arc

Main article: The Search for Hamsuke Arc

Mare is conscripted by his sister Aura to find Hamsuke, who has gotten lost somewhere on the 1st Floor of Nazarick. He figures that they could be at a disadvantage, considering Hamsuke cannot be found on the floor they preside over. When Aura suggested taking Hamsuke's pelt for herself if it turn out dead, Mare refuses her idea as that corpse could be put to use for a lot of Nazarick's experiments. Although there are no signs of teleport gates being used, Mare believes that in the event that Hamsuke did get teleported by a trap, it should not have been sent so far down. Hence, he advised that they keep on searching for the creature's whereabouts until they reach the 4th and 5th Floors as Hamsuke cannot be found on the 3rd Floor.

On the other hand, he considers using [Detect Life] but chose not to because Kyouhukou's Black Capsule contain too many lifeforms to count. Mare and his sister attempted to continue tracking down the hamster to the 2nd Floor and are soon joined by Albedo and Shalltear. In the end, the four find Hamsuke alive, however, none of the female Floor Guardians want to approach the beast, as much to their horror, Hamsuke has a cockroach on her head. The other three push Mare to use his staff to crush the bug in response, but Mare is unsure and was afraid of killing Hamsuke since it is Ainz's pet. He wasn't able to do anything to the hamster as the antics of the female Floor Guardians cause Hamsuke to flee in terror after being threatened with death.

The Two Leaders Arc

Main article: The Two Leaders Arc

Back in Nazarick, Mare sat quietly in the Amphitheater and read a book called "The Adventures of Tom Sawyer." Sensing the teleport gate being used to come here, he paused his reading and went to confront Pulcinella.

Mare is given a secret message from Demiurge's servant, Pulcinella. He reads the message and sees that it is an invitation from Ainz to all the male Floor Guardians to join him for a bath. Meanwhile, he learns from Pulcinella that Demiurge is busy conducting several Breeding Experiments with the best of intentions in mind. Hence, he doesn't understand why the participants in his experiments seem to have some hatred towards Demiurge for what he is doing to them.

After knowing why he can't pass this folder to his sister Aura, Mare circles "Going" to show acceptance of his master's invitation. He understood that it is his duty to pass on this secret message to Cocytus in Guren's stead as the Area Guardian was busy guarding Demiurge's domain while its master was away. In order to keep the content a secret from the female Floor Guardians, Mare decides to contact Aura and lies to her sister about the reason why he needs to go to the 5th Floor. Before long, Mare heads out to search for Cocytus using the Ring of Ainz Ooal Gown, only to find that he isn't in Nazarick, but at the lizardmen's village according to the Frost Virgins.

Realizing he can't step outside Nazarick without high-level vassals to accompany him on the mission, he requested the Frost Virgins' assistance to bring the Floor Guardian to him. His request was turned down as they cannot disobey Cocytus's order to defend his domain other than their master Ainz. This left Mare no other choice but to pay a visit to Nazarick's library, Ashurbanipal. There, he greeted Librarian J and have the undead guide him to where Titus Annaeus Secundus was at in search for the head librarian's assistance. Not only that but Mare also went out of his way to return "The Adventures of Tom Sawyer" to Librarian J and was recommended by the latter to read some unknown book concerning a murder. Upon reaching the Head Librarian's location, Mare asked Titus a favor in exchange for his help.

As a result, Mare assisted Titus on one of his experiments involving the creation of Magic Scrolls while under the condition of not using any of his dragons for it. After assisting Titus, Mare was allowed to borrow high-level vassals like Cocceius, Ulpius, Aelius, Fulvius, and Aurelius as promised. Before leaving Nazarick to visit the lizardmen's village in search for Cocytus once more, he handed his Ring of Ainz Ooal Gown to someone else along the way.

After reaching the lizardmen's village, Mare and his undead bodyguards pay their deepest respects to the statue of their master and praise the lizardmen for their dedication and hard work. When that was done, he then orders Aurelius to find someone among the lizardmen who knows where Cocytus is. Shortly later on, he was met by Shasuryu Shasha, who tells him that Cocytus isn't in the village unfortunately after receiving information by Aurelius on that specific lizardman in question. Mare was informed that Cocytus had gone out on a quest to subjugate the toadmen in the northern part of the lake. While waiting for Cocytus's return to the lizardmen's village, he discusses with Shasuryu about the toadmen and the fish farm his people are constructing. Mare also informs Shasuryu that the food being provided to the lizardmen are created by the power of their master and other 40 Supreme Beings. He reaffirms to Shasuryu that Ainz is their god and will convey the lizardman's kindness to Ainz.

Finishing up his task, Mare returns to Nazarick and hands the invitation folder back to Ainz. The two exchange words as Ainz ends up by expressing his love for the NPCs including Mare himself. He felt awestruck by the way Ainz acts and behave as a leader, hugging him and burying his face in his master's shoulder. While shedding tears about his master's kind words, Mare emotionally and tearfully appreciated Ainz's decision to stay with them unlike the other Supreme Beings including his creator who left. Suddenly, Albedo becomes unable to control her emotions and attempts to rape Ainz. Mare assisted several Eight-Edge Assassins on restraining Albedo while his master punishes her to three days of solitary confinement in Frozen Prison for assaulting him.

Later, Mare joins Ainz, Cocytus, and Demiurge in the Spa Resort. Before heading inside the bath, Mare was cautioned by his master to be careful and not recklessly run around as the floor is wet. Once they are in the bath together, Mare and his master took turns washing, cleaning, and scrubbing each other's back using a brush. Mare reassures Ainz that bathing in hot water for too long is no problem for him as long as he can protect himself with magic. While Mare was in the bath discussing with his master and fellow male Floor Guardians, they were interrupted by the female Floor Guardians, who are attacked by the Lion Golem.

The Dark Hero's Story Arc

Main article: The Dark Hero's Story Arc

Mare and his sister attend a meeting with the rest of the Floor Guardians to decide on what kind of rewards they wish to receive from Ainz. In this meeting, he scolds Aura for trying to take Rororo as a pet without the lizardmen's permission under Cocytus's domain, which he believes is deemed unacceptable.

When Albedo suggests that they should keep the price low in regards to the coupon that lets the person sleep with Ainz, he points out the fault of doing so as being disrespectful to Ainz.

While listening to Demiurge's suggestions, he makes a recommendation that they should take a piece of paper and write the bidding amount on the coupon, and reveal it together. Demiurge likes Mare's idea and is willing to use it twice first in the auction.

Ainz Raises Money Arc

Main article: Ainz Raises Money Arc

Mare is present with his fellow Floor Guardians at a meeting with their master Ainz Ooal Gown. During the meeting, when Ainz inquires about Mare's reward, his answer is that he wants the same sleeping voucher-like Shalltear suggested before.

Like the others, he is given three gold coins to be used as his salary by Ainz. In the next meeting, Mare presents his liege a pendant that was made out of those gold coins.

During another meeting with Ainz, Mare presents and tells his master that he also bought a wooden Momon statue like his sister Aura did, except his is the Bloody Version.

Table Game to Understand Humans Arc

Main article: Table Game to Understand Humans Arc

At Ainz's request, Mare, along with several other Floor Guardians, is asked to play a table game as an exercise to better understand humans.

The Men in the Kingdom Arc

Main article: The Men in the Kingdom Arc

During Operation Gehenna, Mare is paired with Entoma along with a force of summoned monsters as planned out by Demiurge. Mare discusses with Demiurge, stating his concern for their enemy's chance of escaping, Sebas not having a World Item to protect himself and so on. Mare was already informed by Demiurge ahead of time about everything, including his plan. For that reason, if an emergency arises where they cannot contact Demiurge, Mare will be directing the operation in his stead.

Before they set out, Mare and everyone else present in the meeting were informed by Demiurge phase two of Operation Gehenna in great details. The mission both Mare and Entoma are assigned to do was raiding one of the [Eight Fingers]]'s bases.

Once the mission begin, he arrived at Hilma's mansion and covered the building with vines through his magic. Together with Entoma, Mare infiltrate the mansion and take care of the guests and security while interrogating them silently without being caught by Hilma. Shortly later, Mare finds Hilma attempting to escape by using an underground passage after learning that she was the most important person in the mansion. Nonetheless, he effortlessly subdues her by breaking her legs with his staff and later drags her back to Nazarick for further interrogation.

While carrying out the operation, Mare is instructed to create an earthquake as a result of the intense fight happening between Jaldabaoth and the adventurer Momon.

When Jaldabaoth and Momon landed in a different building, Mare was also present there. He attended a private meeting between Demiurge and Ainz, pulling up a chair for his master to sit before they begin their discussion about Operation Gehenna. While Demiurge explain his plans to Ainz, Mare was gestured by the former to take out a bag containing Armageddon Evil and show what was being used as part of their operation. According to Demiurge, Mare seem to have given them an excellent opportunity which will be explained once they return back to Nazarick after fulfilling the operation. Ainz also cleared up Mare's confusion whether the armor he wore during the fight with Jaldabaoth was made from his magic to which he said it was not as he use a transformation spell to allow him in wearing the warrior equipment. After the meeting came to an end, Mare was instructed by Demiurge to send a signal via earthquake once more to the Pleiades to resume fighting and begin the next phase of the operation.

After Hilma's willpower is completely broken due to the interrogation method used by Kyouhukou, he travels with his sister to Eight Fingers’ secret meeting place to apprehend the members there. Mare informs his sister Aura about the reason behind Hilma's fearful behavior towards them as Kyouhukou was responsible for the current state she is in now.

The Invaders of the Large Tomb Arc

Main article: The Invaders of the Large Tomb Arc

While Demiurge explained the success of Operation Gehenna, he noted how Nazarick had successfully subdued the members of the criminal syndicate’s top leadership with the aid of Mare, Neuronist Painkill and Kyouhukou.

After Foresight has been systematically defeated, Ainz then orders Aura to take both Hekkeran Termite and Imina to Gashokukochuuou. However, Aura manages to convince her master to give the task to Mare instead. Hence, upon being informed by his sister, Mare was sent over to Gashokukochuuou's location and dispatched the corpse of Hekkeran and Imina to the Area Guardian in her stead.

Once that was done, Mare and his sister Aura were given the task by Ainz to act as envoys and send a message to the Baharuth Empire. For that reason, they depart from Nazarick while riding their dragons to reach the Empire. After landing in the Imperial Palace's courtyard within Arwintar, Mare was instructed by his sister to use his magic in killing the humans within the courtyard which he did. Seeing the threat Mare and Aura have imposed on the Empire, this left the Emperor of the nation no other choice but to invite he and his sister over for a meeting reception.

The Magic Caster of Destroy Arc

Main article: The Magic Caster of Destroy Arc

Upon being welcomed into the Imperial Palace, Mare introduced himself to the Emperor of the Baharuth Empire.

As he answered the Emperor's question, Mare informs Jircniv that Ainz ordered him and his sister to travel to the Empire by riding on their dragons to get there. During the rest of the conversation, Mare leave it to his sister to handle talks with the Emperor from start to end before they return back to Nazarick after it was over.

Once the meeting delegation between the Empire and Nazarick came to an end with the envoys leaving, Mare and the Floor Guardians engage their master in a conversation of manipulating the Empire into helping them create the Sorcerer Kingdom. Hearing their master's plan, Mare ponders if everything was all for this moment where the Emperor of the Empire arrived to Nazarick.

Mare thoughtfully thinks that talks of negotiation with the Emperor might have leave traces behind if not done within the tomb. Taking this into consideration, he concluded that perhaps his master's plan was to specially bring the Emperor into Nazarick to minimize the amount of leaks. Hearing from Demiurge's explanation that the Emperor is planning to secretly betrayed them, Mare suggests Nazarick takes the initiative of betraying them and wipe him out first.

During the war, Mare serves as Ainz Ooal Gown's attendant, accompanying him to the Imperial Army's base camp at Katze Plains where he stood by his master's side. He applauds and congratulated his master's success in summoning five Dark Young, whilst watching them slaughter the Royal Army. Nonetheless, Mare was told by his master to not lower his guard while the Massacre at Katze Plains is happening before them.

The Ruler of Conspiracy Arc

Main article: The Ruler of Conspiracy Arc

In the morning, both Mare and his sister came to visit Ainz. Although he shows concern if the visit to Ainz was a bother for the latter, his master reassures him that it was not. Meanwhile, it was said by Ainz that he has been tasked with building an Underground Tomb on the outskirts of E-Rantel.

While this is happening, the three elves that had been spared during the Invasion of the Large Tomb are attempting to act as parental surrogates to Mare and his sister. Mare complains on the fact that they keep trying to go out of their way and help dress him which according to Aura. Nonetheless, Ainz hopes that they can help with Mare's and his sister's development as fellow dark elves. In a way, Mare and Aura are given the elf slaves to take care of on their floor.

At the same time, both the two dark elves are picked up by Ainz, placed on each lap, and coddled in fatherly affection. Seeing Albedo's jealousy, Mare suggests Ainz that he was willing to give up his spot for her sake. For that reason, under Ainz's order, he allows Mare to get off of his master's lap and lets Albedo take his spot instead.

Additionally, Mare, alongside his sister, decides to make a suggestion to Ainz that boys should wear girls' clothes, and girls should wear boys' clothes. However, the suggestion is struck down by Ainz when he convinces everyone in the room that the two dark elves are dressed that way because their creator wanted them to be special. When Ainz asked the two whether it is fine for them to give away their specialness to the people of the Sorcerer Kingdom, Mare was the first to adamantly voice her refusal aloud. Mare made a vow to his master that he will never let anyone but himself or his sister have the specialness granted exclusively to them by their creator.

On the other hand, as Aura considers thinking over how to replenish the Sorcerer Kingdom's resources, Mare easily convinced her that they shouldn't worry about it since their master will have that matter settled. When Albedo decides to leave Pandora's Actor with the task of managing Nazarick and E-Rantel while she is away, Mare and his sister were confident that it will be no problem if it's Ainz's creation.

The Craftsman of Dwarf Arc

Main article: The Craftsman of Dwarf Arc

Shalltear informs Mare that Ainz has given her the task of maintaining surveillance on the Great Tomb of Nazarick since she and their master will be traveling to the Dwarf Kingdom. Mare was given the order by Ainz to proceed to Shalltear's room, the Adipocere Chamber where he will do his duty in the meantime while the vampire is away. Not only that, but Mare was also responsible for safekeeping Shalltear's Ring of Ainz Ooal Gown as she depart from Nazarick to go on Ainz's expedition. With Shalltear gone, Mare temporarily acts as the protector of the tomb.

Nazarick Mythology Arc

Main article: Nazarick Mythology Arc

Mare and his sister Aura attend a meeting to create a mythology of their master in order to solidify his hold over the masses. In the twins' myth story, they weave a classic super sentai story where a group known as "The Ainz Five" fight monsters to save the world until they decide to eradicate the human race. The humans attempt to resist, but the Ainz Five transform into a giant golem, wiping out humanity in a never-ending cycle.

The Witch of the Falling Kingdom Arc

Main article: The Witch of the Falling Kingdom Arc

In the Audience Room, Mare was present with the other Floor Guardians. There he quietly stands by and watches Shalltear bring Hilma Cygnaeus over to his master Ainz as a witness who can explain their questions about the attack on the Sorcerer Kingdom's trade caravan of grains. Every Floor Guardian including Mare during the meeting, approved of the punishment Ainz has suggested for Hilma Cygnaeus to do. Once that matter was concluded, discussion about Philip resumes where it left off while the Overseer explains their strategy for the Fall of the Re-Estize Kingdom.

When Ainz states that maybe Philip did what he did without thinking about the consequences of his actions first, Albedo doubts the nobleman to be this stupid. However, as Demiurge shows his support to Ainz's notion, Mare and his sister also agreed with their master's forethought. As Demiurge inquires further from the Floor Guardians on what punishment they should impose on Philip, Mare agreed with his sister's idea of having to kill the nobleman for what he did to their caravan.

Since one month have pass by after the Sorcerer Kingdom's declaration of war, Mare was among one of the Floor Guardians to have been able to successfully lay siege on territories be it a city or village within the Re-Estize Kingdom. When the war first started, Mare was asked by his master Ainz to destroy a small town. Although he felt terribly ashamed by how poor the results had been for him from that attack on the town, Mare was kindly and gently encouraged by Ainz to study hard and to better himself.

While Ainz and his 10,000 undead army was in the Re-Estize capital, it was said that Mare had been given the order by him to use his magic on aiding the creation of the fronts initially. Later, due to a specific reason, Mare had been relegated to simply watching the soldiers build the front at Ainz’s side. During the meantime, Ainz was thinking that it may be a good idea to leave all civil engineering tasks in the future to Mare at some point. Not only that, but have Mare take in new subordinates like demi-humans and heteromorphs who are adept at digging tunnels underground under his command.

After Ainz returns from his meeting with Zanac, Mare had a discussion with Aura and Cocytus about the upcoming siege of the capital. With Mare as second-in-command after Cocytus, he and the Floor Guardian were permitted to use the full extent of their abilities and not to leave a single citizen of the Re-Estize Kingdom unscathed. Once the battle began, Mare and his Hanzos set off from the front he had established in front of the capital. Mare was the one in charge of casting offensive AOE spells to render the entire capital into a mountain of ash.

In the battle that commenced three days prior to the arrival of the Sorcerer Kingdom's forces at the Royal Capital, Mare had now already long since killed off a significant number of humans so far. Considering how vast and large the surroundings of Re-Estize is, Mare is starting to figure out how to properly demolish a city more efficiently and kill every human within it using his AOE spell, [Earthquake]. This was after he had practiced destroying multiple cities with his master through several attempts while having gained relevant experience for it before reaching the Royal Capital. From that experience alone, Mare was able to develop a clear understanding of how difficult it was to destroy a city, of how hard of a task it was to kill every single inhabitant who reside in it. Mare acknowledge that guaranteeing every human living in the city died along with the structures' destruction was a challenging thing to do and requires some time to accomplish.

For that reason, upon arriving at Re-Estize with the Hanzos, Mare sat by himself on top of the second-highest tower in the Ro Lente Castle, overlooking the Royal Capital to prepare his spellcasting hidden and uninterrupted. During his stay there, he used the long-range spell, [Earthquake] on the capital's surroundings multiple times ever since then. He casted that same spell repeatedly and continuously until every structure in the city was completely destroyed and reduced into a mountain of rubble. At the same time, Mare made sure to kill off all the humans he can within this magically induced [Earthquake]'s area range of effect created and casted by him. After recalling Ainz's words of encouragement, Mare was determined to destroy more towns and cities and kill more people to become the person Bukubukuchagama wanted him to be.

While overseeing his mission, he ended up encountering Climb along the way upon spotting the warrior heading to the small warehouse to hide items. Mare kindly warns the warrior to leave while he still can before the former continues destroying the buildings around him. Once Climb left without attempting to put up a fight with him, Mare resume his usual mission of demolishing the surrounding structures, continuing to bring forth destruction in its wake until the task is completed.

Trivia

• Mare's name is Italian, with "mare" meaning "sea," "Bello" meaning "beautiful," and "Fiore" meaning "flower."
• In the Web Novel, Mare Bello Fiore doesn't exist.
• Mare is the first NPC before Albedo and Pandora's Actor to have been given the Ring of Ainz Ooal Gown from Ainz. He wears the ring on his left hand.
• Like his sister, he is one of the few races in Nazarick that will eventually age, but its unknown if they will die or remain a certain age forever.
• According to the author Maruyama, many years from now, Mare will become a handsome/good-looking guy and that he doesn't cross-dress anymore. Even as an adult, he’ll still be fond of Ainz. Maruyama described Mare's relationship with Ainz as familial, the significance isn’t the homosexual longing to be with an older brother.

Quotes

• (To Aura): "I, I would rather not have to meet intruders...they, they're scary..."
• (To Aura): "Ah, I suddenly remembered that I had something urgent to do..."
• (To Aura after provoking Shalltear): "But, but Nee-chan, maybe you shouldn’t have said that..."
• (To Momonga): "A, a very gentle person."
• (To Demiurge): "If, if it helps Momonga-sama...I'm willing to contribute. But how will I have children?"
• (To Demiurge): "That, that's true. I've heard that all the underlings were created after careful calculation by one of the Supreme Beings...if we carelessly increase our numbers, we'll be scolded. I, I don't want to be scolded by Momonga-sama..."
• (To Demiurge about the way he dresses): "This was Bukubukuchagama-sama's decision. She said this was called a 'trap', so it should have nothing to do with my gender."
• (To Momonga): "I, I can't do that, how could I not speak respectfully to a Supreme Being...actually, Nee-chan shouldn’t be doing that too. It, it's terribly rude..."
• (To Momonga): "It, it's not like that! We exist to give our all for the Supreme Beings, so working hard is only to be expected!"
• (To Momonga): "Momonga-sama, th-thank you for this great gift...I promise that from today onward I will work harder so I do not disappoint you!"
• (To the Floor Guardians): "Ah, y-yes. Ah, I was wondering why he had sent out such weak undead at first. Ah, ah..per-perhaps...Ainz-sama had planned on the attack failing from the start..."
• (To Ainz): "No...not at all. I simply thought you looked very handsome, Ainz-sama."
• (To Ainz): "F-forgive me, Ainz-sama. But, I really do think you look handsome. Even just now, the way you sat down looked just like how the supreme ruler of Nazarick ought to be"
• (To Ainz): "A-Ainz-sama! Please...please let me help you wash your back!"
• (To Aura about Hilma): "I, I think she means being taken to Kyouhukou's room, where her organs were being constantly devoured from the inside."
• (To the Floor Guardians and other NPCs about Ainz): "Then, then. M-may I try? Erm...because Ainz-sama is very kind, it might be good to let people know that. Then, then, m-maybe we could try, the Merciful King?"
• (To Ainz about Aura and his creator): "Never! I'll never let anyone but Nee-chan have Bukubukuchagama-sama's specialness!"

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