Maria is a common name for female characters, and there are several who share this name.
Maria from the series Blood Alone
, and is the daughter of a retired hitman. Maria was born with a frail constitution, and was not expected to survive to adulthood. She was abducted by vampires, and turned into a Renfield, a person who has drunk vampire blood, and thus lost any sort of free will.
Maria was freed from her Blood Parent by Kuroe Kurose
, and adopted by an elder vampire named Higure, who now keeps Maria and her father under his protection. Maria is the first friend her own age that Misaki Minato
has made since being turned into a vampire.