Merlin

She is a member of the Seven Deadly Sins. She has the mark of the boars sin of gluttony. She was regarded as the greatest mage in Britannia and is the master of [Vivian](https://anilist.co/character/131564) as well as a teacher of [King Arthur of Camelot](https://anilist.co/character/122210). She came to the aid of the sins in their battle against [Hendirkson](https://anilist.co/character/86679) but had to leave to tend to the King. She has not officially rejoined the sins but said she would as soon as she was finished with her other business.