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Spoiler Alert Spoiler Alert: WARNING! This page happens to contain a lot of heavy spoilers that are all originated from the Overlord Light Novel series written by the author Kugane Maruyama. To every Anime-only watchers and Manga-only reader out there viewing this warning, please mindfully consider your decision first before choosing to expose yourself on reading the information below. If you're not currently up-to-date with the main source material in the official books, do consider staying away from the page for non-spoiler sake until you actually read it first ahead of time.

Theo Rakheshir (テオ・ラケシル) is the Guildmaster of the Magician's Guild in E-Rantel.


Theo is an extremely thin and neurotic-looking man wearing a robe.


Though he appears as a calm and wise man, his demeanor only hides a thirst for knowledge and all things magic that border on obsession, his calm composure was momentarily shattered with the appearance of a Sealing Crystal holding a spell of the mythical 8th Tier, that is considered to be a spell of myths and legends. Having lost of sense of self and overwhelmed with excitement, he went as far as licking it all over, then rubbing it against his cheek before being brought back to reason.


Not much is said about Theo's history, but apparently, when he was younger he was a close teammate of Ainzach in their adventurer days.[2]


The Bloody Valkyrie Arc[]

Main article: The Bloody Valkyrie Arc

Theo made his first appearance when the gathering with the mithril ranked adventurer teams of E-Rantel was held. Kralgra, Sky Wolf, Rainbow, and Darkness, along with E-Rantel's mayor Panasolei Gruze Day Rettenmaier and Adventurer Guildmaster Pluton Ainzach to discuss the appearance of the powerful vampire Honyopenyoko. After Momon revealed he was familiar with the vampire, he declared he will slay it, revealing his Sealing Crystal. The item attracts much attention from the guildmaster who wanted to examine it. Upon determining it indeed held an 8th Tier spell, he was against using the item on the vampire believing it to be too much of a waste. But he was overruled by Ainzach.[3]

The Sealed Evil Tree Arc[]

Main article: The Sealed Evil Tree Arc

More than a month after the defeat of the vampire, Theo and Ainzach meet with Momon to personally request him to retrieve a rare herb located in the northern region of the Great Forest of Tob.[4]

The Lizard Man Heroes Arc[]

Main article: The Lizard Man Heroes Arc

Theo at the request of Momon provided him with a map of the Re-Estize Kingdom and the surrounding countries. He sadly told him that the map was of crude quality and thus not very reliable.[5] He also discussed with Ainzach of trying to set up Momon to visit several brothels in order to try to get one of the girls pregnant to try to give him a reason to stay chained to the city.

The Ruler of Conspiracy Arc[]

Main article: The Ruler of Conspiracy Arc

Before E-Rantel was officially annexed by the Sorcerer Kingdom, the Magician's Guild evacuated most of its members and magical items out of the city, effectively disbanding the guild. Theo remained behind to monitor the political situation with his comrade, Pluton Ainzach. When Ainz paid the Adventurer's Guild a visit to discuss the future of the guild, Theo hid in Ainzach's office overhearing the conversation between the two.

After Ainz left the Adventurer's Guild, Ainzach and Theo reviewed his offer together. Like his friend Ainzach, Theo was captivated by Ainz's speech of the ideal adventurer and their greater roles they would play in the Sorcerer Kingdom. He wholeheartedly agreed that it was lucrative and joked with Ainzach perhaps both would go on a journey together as real adventurers.[6]

Ainz (Isekai Quartet) NOTICE: The following section and subsequent subsections are considered NON-CANON to the Overlord Light Novels.

Mass for the Dead Arc[]

Main article: Mass for the Dead Arc

When E-Rantel began to face an influx of refugees who were escaping the Chaos Beasts and Contaminated Beasts, Theo worked with the city officials and other figures such as Saint Clementine to address the situation. It was then discussed and agreed that the city needed to be expanded to accommodate the growing population and Clementine was elected to try to appeal to the masses to support the construction of the Fourth Wall.[7]

The Magician's Guildmaster attended a meeting of E-Rantel's city's leader to organize a Harvest Festival to celebrate the bountiful harvest of the Fourth Wall. He agreed to the suggestion by Saint Clementine to have the protagonist host the event. Once the protagonist brought the proposal of doing a Halloween-inspired event, renamed as "Greetings and Victory", the guildmaster following Ainzach's example to open booths at the festival lent his support. He was interested in the prize that the protagonist prepared for the mock battle portion of the event, a Longevity Nut. The magic caster wished to procure more nuts from the Great Forest of Tob, but was disappointed to learn from the members of the Darknesswho retrieved the item, that the forest was dangerous as the tree that bored it was guarded by powerful magical beasts and were in competition with the Chaos Beasts infesting the area. Still he was satisfied that the nut would be processed as a potion to the winner.[8]

END of NON-CANON content

Abilities and Powers[]

Theo Rakheshir holds the highest authority as Guildmaster of the Magician's Guild in E-Rantel.


  • Appraisal Magic Item: Identifies the item in which the spell is cast upon.
  • Detect Enchant: Detects and analyses the type of magic in which the spell is cast upon.



Theo is intrigued by the origins of Momon, not just about his strength and abilities, but also the strange magical crystal that he has in his possession. Through his rationalizations, he theorized that Momon was a prince of a fallen nation that was destroyed by vampires and is now seeking revenge.

Pluton Ainzach[]

Besides holding a key position in E-Rantel, he and Pluton Ainzach are old friends and trust each other with their personal thoughts. He is also aware of Ainzach's devious methods to either keep Momon working for E-Rantel or at least produce an offspring with a prostitute, where he shares a mix feeling about Ainzach’s questionable plan but agrees to go along with it.

Lizzie Bareare[]

Lizzie is Theo's colleague in the study of the magical arts. She was the one who informed him of a new adventurer that had possessed a strange healing potion.

Panasolei Gruze Day Rettenmaier[]

Not much is known about Theo's relationship with Panasolei; however, it has been shown that he respects the man as mayor of E-Rantel.


  • In the Anime, Theo Rakheshir didn't make his appearance in the Adventurer's Guild Meeting or when he eavesdrop on Sorcerer King Ainz Ooal Gown's conversation with Pluton Ainzach. But he does make an appearance after Ainz's conversation with Ainzach in the Manga.
  • Theo's CD Drama voice actor is the same person who voices Sukyu Juju in Overlord II.
  • Theo is mentioned in the game, but he makes no visual appearance.
  • In the Mass for the Dead game, the Magician's Guildmaster is never referred by name, only by title.


  • (To Ainzach about Momon and Ainz): "Well, that's true. It's disrespectful to compare a hero of humanity to the undead Sorcerer King. However, when you consider that they're both beings of superhuman might, they do seem quite similar. If I had to describe it... yes, I can feel the same presence around them, one which only those extraordinary entities could radiate."


  1. Overlord First Half Chapter 60: Settings
  2. Overlord First Half Chapter 36: Investigation Part 1
  3. Overlord Volume 03 Chapter 3: Confusion and Understanding
  4. Overlord Volume 04 Special Drama CD: The Sealed Evil Tree Arc
  5. Overlord Volume 04 Prologue
  6. Overlord Volume 10 Chapter 1: Sorcerer Kingdom of Ainz Ooal Gown
  7. Memory of Chaos: Clementine
  8. Mass for the Dead Special Event: E-Rantel's Harvest Festival


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Sorcerer Kingdom
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Prime Minister
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