Maria Alucard teaches 3-C Homeroom at Magami Academy and is responsible for Tatsuma, Kyouichi, and Aoi's class. She can sometimes act childish as a teacher, losing her temper enough to scream and throw things at students who misbehave. Despite this, she seems to be annoyed by Kyouichi, who calls her "Maria-chan" and frequently skips class with excuses. Tatsuma's habit of sleeping through her class also does not sit well with Maria. However, despite these shortcomings, Maria is popular among the students due to her ability to act like a child herself. She rides a motorcycle to work every day and speaks English outside of class because she teaches English at Magami Academy. While it's difficult for her to admit it, Maria seems to be very protective of her students and often seeks information from Morihito Inugami about the whereabouts of the mysterious Magami Five. Like Inugami, Maria appears to have a deeper understanding of supernatural powers than most people.
She is, in reality, a vampire-like oni (demon). Maria Alucard gets some focus in a brief arc in season two, where a short flashback shows her as an aristocrat in an early-century France, watching her family burn at the stake. She seems to be living her life in secrecy; not hunting, but being hunted.