She is the protagonist of Akuma to Dolce. Being the daughter of a demon-summoner, she also possesses the gift to summon. In the story, her parents are abroad, so she lives alone. However, she uses her gifts to help with everyday normal tasks, in exchange for giving small treats to the familiar that assists her. She also is an amazing baker, which adds to her reputation among the lesser demons, though she normally only summons "Chibi-chan". She one day accidently summons the high-level and aristocratic demon Belze to remove a stain on her skirt. Seeing what she had to offer (a small piece of candy), Belze is enraged and is about to kill her when he catches a wift of the tarts she baked earlier. Obviously having a fetish with sweets, Mayuri offers the tarts to Belze and from that moment on, their relationship grew.