メフィスト

The other main character of "Faust". Unlike the original story which highlights the price of the demonic pact, Mephisto's raison d'etre in the story world is to serve others without asking for anything in return. Although she primarily serves Faust, she will take requests from Goethe and others if she thinks it appropriate.

She can manipulate Faust like a human club to strike the worms. In combat, her nails become claws, but she primarily relies on magic to obliterate worms.

 Accustomed to using magic to accomplish whatever task  she is set, Mephisto is unfamiliar with the concept of achieving something through graft and effort. Through the events of the main story, she also learns the value of letting Faust use her as a tool to achieve her ends, instead of as a crutch.

Mephisto's magic is capable of not only summoning mundane objects like the perfect hamburger, it can even accomplish the impossible such as delivering completed works from authors who died before they could finish. 

Mephisto's obsession with serving others drives her on even when she's in no physical condition to do so. The stress of not helping others and being waited on instead does have spectacular consequences when she finally loses it. /