Maria is one of the last of, three known pure-breed vampires left in the manga's setting; the other two being his mother and father. In Japan, Maria is considered a protected endangered species. Like most legends, Maria is very weak to religious symbols (even vaguely), water, and sunlight. He and Toko meant when they were six years old, which is also the day Maria was introduced to the human world. Toko's influence has inspired Maria to love humankind, even when many humans fear him for being a vampire. He likes to take part in community activities and help out others.