Guideau was once a male being of overwhelming power who took the form of a beast—until a witch's curse forcibly trapped his soul within the body of a young girl, while his true form remains sealed inside a coffin carried by his companion Ashaf. Driven by the desire to reclaim his original body and exact revenge upon the witch responsible, she travels alongside Ashaf hunting witches across.. A mysterious "beast", Guideau is trapped in a female form due to a witch's curse, but her real form is a powerful masked man with a pitch-black right arm and is the "natural enemy" of witches. She reluctantly works with the Order of Magical Resonance to find the witch who hexed her and break the curse.
Guideau (ギド Gido?) is the main protagonist of the story. She is a young "human" who travels with the high mage Ashaf in search for the witch who cursed her into her present female form. Guideau's true form is that of a Beast and is the only natural enemy witches have. It is contained within the coffin carried on Ashaf's back to keep it in check and can only liberated if Guideau kisses a.. Guideau is one of the main characters in *The Witch and the Beast*. She looks like a young girl, but she was actually once a man who fell victim to a witch's curse. Because of this, she holds a deep hatred for witches, especially Angela Anne Huell, who cast the curse on her. Guideau starts her journey seeking revenge and meets Ashaf. They team up to hunt witches, and their partnership, first.