Solution Epsilon

Solution Epsilon (ソリュシャン・イプシロン, Solution・Ε) is a slime battle maid and a member of the "Pleiades Six Stars," the battle maid squad of the Great Tomb of Nazarick. She was created by Herohero.

Appearance
Solution is a blonde beauty with spiral curls and blue eyes, and clothing that emphasizes her sex appeal. The top of her maid uniform is designed to open easily, so Solution can absorb victims into her body. She is said to rival the most beautiful woman in the Re-Estize Kingdom, the Golden Princess. As she is of the slime race, Solution can change her appearance as she wishes.

Personality
Solution thinks of humans as food and toys. She loves to swallow humans alive and enjoys the suffering and the struggling of her victims. Solution tends lure to lustful men who are after her body in with a literal boobytrap by exposing her chest to them, tricking them into touching her so that she can then absorb them thereafter. She does not mind the screams of humans during their last moments before consuming her victims with her body. She is, along with Narberal Gamma, one of the two "extremely dangerous" Pleiades.

She is also good at disguising her nature, acting like a childish and rude lady when she is out getting information with Sebas. It seems that her true nature is quite logical, which is suggested by her complaint about the inefficient behaviors of Sebas or Entoma.

She is willing to meet and face her superior and someone a lot stronger than her with force if she feels that their actions disregard Nazarick's benefits or bring danger to Nazarick. She is able to independently make decisions on her own when needed and even betray her superior if she feels that they are obstructing Nazarick's plans.

Background
Solution Epsilon was created by Herohero to be one of the battle maids, the Pleiades. They served as a last line of defense against intruders. However, because she is unlikely to be able to stand against enemy players who managed to come this far, her only real purpose was to distract the invaders until the guild members of Ainz Ooal Gown were able to fully prepare for their final stand in the throne room.

The Undead King Arc
Solution, along with her sisters, were ordered by Momonga to guard the 9th Floor. She and the other Pleiades were on standby in wait for Momonga.

The Bloody Valkyrie Arc
Solution disguises herself as a spoiled rich mistress from the Baharuth Empire while Sebas Tian acts as her butler who follows her every command, despite being her superior in reality. In the Shining Golden Pavilion, Solution intentionally makes loud complaints about the food, giving everyone a bad impression of her. She rudely tells Sebas to ready the carriage and departs immediately. In private, she apologizes to Sebas for her actions while talking about Zach acting according to their plan, silently spying on him. Solution tells Sebas that she wants that human for herself and Sebas replies that she will have to ask permission from Shalltear to have her request accepted.

As the carriage goes on its way, she asks for Shalltear's permission to devour Zach, which she receives, much to her delight. When the bandits targeting them have been lured out, they are slaughtered by Shalltear and her Vampire Brides as Solution devours Zach. Solution has a brief discussion with Shalltear about how she is able to take care of Zach inside her as a Predator Slime. She makes a promise with Shalltear, who suggests that they can have fun together once again whenever Nazarick receives intruders, which the two agree to share between themselves. She and Sebas split off from Shalltear and continue on their way to the Royal Capital.

The Maid Tea Party Arc
Solution participates in the monthly Pleiades report and tea party along with her sisters. She reports about her work with Sebas in the Kingdom. She informs her sisters about the job progressing smoothly. When Narberal reports her work with Ainz, Solution and the others get jealous of Naberal's closeness with Ainz. Solution states that she likes the meat of young girls and that she likes the sensation of eating humans alive. She asks Yuri if they can request Ainz to let them have one of the humans that are being interrogated while they're still alive.

The Men in the Kingdom Arc
and The Men in the Kingdom II Arc Solution greets Sebas but notices that he has brought a human with him and tells him that a human may jeopardize their mission. Despite this, she is ordered to heal the human and not report this incident to Ainz. After some time, a group of guards led by Staffan Heivish and Succulent appears at their temporary residence, accusing them of involving themselves with slave trafficking and for having bought Tuare as a slave. They then demand that they pay a heavy fine and turn over Tuare to their custody. Once they leave, Solution asks Sebas to dispose of the human before she causes more trouble for their mission. When Sebas leaves, Solution decides to contact Ainz and inform him that Sebas may have gone rogue.

She welcomes Sebas back and informs him of their master, Ainz Ooal Gown, waiting for him. After confirming Sebas' loyalty, she and Sebas prepare to return to Nazarick after buying wheat. Sebas tells Solution that Tuare has been kidnapped and asks her to inform Ainz of the same. After Sebas kills four members of the Six Arms, she proceeds to kidnap the audience. Solution participates in Demiurge's plan to make Momon a lasting hero in the Re-Estize Kingdom. She plays the part along with the other battle maids, excluding Narberal, of acting as Jaldabaoth's underlings with her face disguised with a mask. She partners with Lupusregina Beta and Entoma Vasilissa Zeta. They fight against Nabe and continue to do so until Jaldabaoth orders a retreat.

The Invaders of the Large Tomb Arc
When Ainz holds a grand court in the Throne Room, he speaks to each of his personal level servants, asking what they want as a reward for their efforts. Solution requests to be given humans, particularly virgins, for her to devour. Ainz partially grants her request, giving her the captured Eight Fingers' agents, but refuses to give her any virgins.

Solution, along with her fellow Pleiades, except for Narberal, encounters Dragon Hunt on the surface of the Great Tomb of Nazarick. They have been sent to see if the Nazarick Old Guarders are able to capture enemies trying to escape from the tomb. To her and the other Pleiades' surprise, Dragon Hunt decides to stay and fight. She and her sisters try to cheer for the Dragon Hunt workers, but they are easily slaughtered by the Nazarick Old Guarders.

The Pleiades Day Arc
Sometime after the annexation of E-Rantel, Solution kidnaps Miyoshi out of jealousy for his duty in washing Ainz's body. When questioned directly by Ainz, she remains silent on Miyoshi's whereabouts, forcing Ainz to ask Yuri Alpha to compel the answer from her. She reveals her actions after being pressured by Yuri, claiming she wants to wash Ainz's body. Expecting to be punished, Ainz calmly explains such duties are beneath her station as a daughter of Herohero. After apologizing to Ainz, Solution extracts Miyoshi from herself. Ainz orders her to return the slime back to where she found him after he is washed.

The Witch of the Falling Kingdom Arc
When Ainz Ooal Gown is called back from E-Rantel, Solution greets him at Nazarick. She returns to Ainz his Ring of Ainz Ooal Gown in order to teleport to the 10th Floor.

Mass for the Dead Arc
At the time of the Great Tomb of Nazarick's transfer to the New World, Solution Epsilon was among the NPCs that were killed in the transition. Momonga finding the dungeon in ruins due to the strange Cracks and overrun by Chaos Beasts quickly revived her and the Pleiades with magic. Unfortunately the maid suffered a severe abnormal drop in levels since her revival as did the other NPCs that were brought back to life. When the protagonist appeared before Momonga who was suspicious on the identity of the homunculus, Solution can be one maids that vouches on his identity as being a creation of Herohero. After the protagonist leaves with a Redeem Slime summon and Narberal Gamma, Solution is left with the remaining Pleiades in Nazarick. To rebuild Nazarick, more information was needed to determine the new phenomena that was now affecting the dungeon. Thus Momonga had the maids train to prepare for a survey of the Cracks. When they were deemed ready Solution and her sisters investigated the Cracks, fighting the Chaos Beasts to learn its secrets.

Solution with the rest of her sisters greeted Narberal Gamma upon her return from the outside world. From the doppelgänger she gained some insight on human society and started practicing on how to communicate with them by referring them as "maggots". It gained some attention from Sebas Tian and Momonga who intervene to correct some misconceptions and focus their training on hospitality. The slime would help Demiurge's project in creating the Throne of Death as a replacement to the Throne of Kings, by devouring the human that provided the skin for the leather after the demon was done harvesting.

While repairing the baths on the 9th Floor, Solution learned from Yuri of the existence of Miyoshi the personal bathing attendant of Momonga. Jealous of the slime's position the maid kidnapped Miyoshi, hiding him in her body believing that if he were to disappear the role of cleaning Momonga who fall to her. The results of her kidnapping were not as planned, as the disappearance of Miyoshi led Momonga and others that an intruder was in Nazarick. It caused a lockdown of the tomb and a wide search which caused Solution to be in horror at the wild goose chase she caused. The maid tried to hide her involvement in the kidnapping but as things began to spiral more out of control, Solution caved in and confessed to the Floor Guardians and Momonga. Though she confessed to the crime she refused to divulged the reason so Yuri was brought to compel her and release Miyoshi. After she divulged the reason, Momonga rather than be angry at her deception was curious that she was able to do such a thing and was curious at the limits of how far she would go. In the end Momonga apologized if he made her feel insignificant for not asking her to be his bathing attendant, and explained that he could not ask her as she was the daughter of his friend Herohero and thus would be improper. The maid would assist in bringing an air of hospitality to the healing Nazarick by taking over CZ2I28 Delta's shift to allow the other maid to create a flower garden on the 6th Floor.

Solution would infiltrate the Re-Estize Kingdom under the alias, Soi, as an adventurer in E-Rantel. She appeared weeks before the protagonist and Slimeko arrived at the city. As Soi she was a abrasive new copper rank adventurer annoyed by her low standing. Upon seeing the protagonist given the opportunity to be promoted based on his skills she demanded the same treatment to advance at the guild. After the protagonist and her prove their worth and are given the opportunity to be bumped up on the adventurer ranking, the protagonist instead declines wanting to earn it the fair way. His decision is followed in suit by Soi who invites herself on his team. Once the three were alone, Soi dropped the act and greeted them properly explaining her mission was to meet up with them and casually join them as an adventurer without associating Nazarick. She also brings them up to speed that another agent, Sebas Tian has also infiltrated the city. That being said the trio then go out to make a name for themselves as adventurers. One of the first jobs they received is by referral of Saint Clementine to assist Sophie Noia to collect samples of the Sanitary Slimes in the sewers of the city. The trio expected the job to be simple, but find that the once passive slimes have gone aggressive and hostile. The three managed to survive the encounter and also discovered a hidden room in the sewer system that bring more questions.

Returning back to the guild, they were welcomed warmly by Saint Clementine on their success. After the slime samples were given to Sophie, Soi warned her comrades about Clementine as she could tell that the woman was masking her emotions. The group then takes a job to provide security for the Quarry near the city and where Sebas Tian is working. When they arrive at the mine they learn of an individual with a reputation for being selfless and kind, which Soi figures out to be Sebas, the butler's alias. It appears Sebas has been protecting the human miners from injury, using his superior strength to save them from mining accidents and drive away the local demi-human raiders. The actions cause Soi to scold Sebas as their orders were explicit in not drawing unwanted attention in their given professions. Thinking that he has been letting the humans become too reliant on him she helped the undercover butler to orchestrate a situation where the miners would have to come to rescue Sebas. It works and allows Sebas to maintain his cover.

Soi would meet one of the protagonist's associates Nigun Grid Luin and Ian Als Heim of the Sunlight Scripture. At this point the captain of the Sculpture shocks her as he already knows her name having kept tabs on the protagonist's entry in the Adventurer's Guild. She is unimpressed by the man and was willing to comply with Nigun to have a duel to test her and the protagonists' skills. The resulting duel was a draw but it was enough to convince Nigun that the two were strong.

Soi's team's fame began to grow with promise due to their already rising status as platinum adventurers. The group would attract the attention of the city officials as they took more hazardous jobs like undead subjugation at the E-Rantel's Cemetery. On another they were contracted by the Pharmacist's Guild to acquire soil samples from the Great Forest of Tob for a herb cultivation project. At the same time Lizzie Bareare hired them to retrieve some items belonging to her grandson's friend in Carne Village. At the forest she finally meets Nazarick's newest recruit, Hamsuke. After the job the group then take on another undead clean up mission in the Katze Plains where they meet Leinas Rockbruise and Nimble Arc Dale Anoch. Once that was done, Soi helped escort a supply caravan through the fog when they were attacked by undead, which included a Skeletal Dragon that she proceeded to defeat. As the journey continued her team were instrumental in repelling an attack by a Death Knight, impressing the imperial knights.

Upon their return to E-Rantel, Soi's team were brought to a hearing to stand accused by Lakyus Alvein Dale Aindra for being involved in a plot to sabotage the city. Since the slime samples they brought back to Sophie on their first job showed signs of contamination of high levels of alchemical solutions they were suspected of supplying the substance to Hilma Cygnaeus, a current member of the Pharmacist's Guild but at one time a high ranking executive of Eight Fingers. Their involvement in the mutation of the slimes is later proven to be null as it was determined that the adventurers could not have supplied enough herbs to Hilma as they job was only recent. The culprit turned out to be an accident from run off water from the herb field that entered the sewers and caused the slimes to undergo their violent change. With the city in danger of a massive swarm of mutant slimes, Soi's team volunteered to handle them. At the Sewage Treatment Plant they met with Sebas who was contacted by Soi to aid them. The mutant slimes are killed and the team faces off against a Super Giant Sanitary Slime. Soi helps defeat it by using her superior acid to kill it and claim its slime core as proof of their victory.

Trivia

 * Her race is based on H. P. Lovecraft's Cthulhu Mythos.

Quotes

 * (To Zach): "Please don't be too excited. If possible...I'd like you to be gentle with me. It would make me very happy."
 * (To Zach): "The truth is, I deeply enjoy watching things dissolve. Therefore, I felt it was a happy coincidence that you wanted to be inside me, Zack-san."
 * (To Zach): "I'm sorry, but I am resistant to physical attacks, so a blow like that cannot harm me. Then, I shall dissolve it."
 * (To Zach): "I am a predatory Slime. Since time is limited, I will need to swallow you up."
 * (To Shalltear about Zach): "My apologies, I did not know he was still so full of energy."
 * (To Shalltear): "I could secrete a stronger acid to kill him immediately if you wish, but since a human who wishes to enter me is a rare occasion, I would like to let him enjoy it for an entire day."
 * (To Shalltear): "No, I did not. If I dissolved his throat with acid, he might suffocate due to being unable to breathe. Therefore, I inserted part of my body into him to suppress his voice, and it also has the effect of preventing bad smells."
 * (To Shalltear): "Then, please do not forget about my share. I would like to swallow them up to the chest and expose the rest of them. That ought to be quite interesting as well."
 * (To Ainz): "Why! Tell me why! I am a Slime too! I can clean you better than Miyoshi-kun-sama! Why! Why won't you let me bathe with you and lick your glorious body clean?!"

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Solution Epsilon