One of the Witch Queen's (Ban Mido's grandmother) best disciples, Maria is an expert when it comes to magic and the occult. Outwardly, she resembles a busty lady in her late 20s (her bustline even beats that of Hevn's). But, it's actually just magic on her part; she's 99 years old and looks like an ancient mummy. The Witch Queen entrusted a young Ban to her, and she took care of him for a few years. She likens Ban to the son she never had, indicating the fondness she has of him. Although Ban was rude to her, he still has respect for his former guardian. She first offers her aid to the GB duo in the Divine Design (Kami no Kijitsu) arc. At times, she can act like a childish young lady; as such, she's quite fond of Ginji Amano, who turns into his chibi form around her.