Ulbert is a guild member of Ainz Ooal Gown and regarded as one of the Almighty 41 Supreme Beings by the NPCs of the Great Tomb of Nazarick. He had one of the strongest mage caster class and is the creator of Demiurge.

Among all of the guild members, Ulbert Alain Odle was the person who fixated on the word "evil" the most, since he suffered from chuunibiyou. He is one of the members who suggested taking over the world by joke.

Ulbert was jealous of Touch Me, which was caused by a problem in real life, and usually argued with him. The conflict between Touch Me and Ulbert seems to be related with the resignation of Touch Me as guild master of Ainz Ooal Gown. However, Momonga thinks of their arguments as a pleasant memory, and believes they were still good friends with each other.

(Source: Overlord Wikia)