The demon maid who helps Oga take care of the child, chosen to be the child's "Mother". She reveres the Demon Lord and feels that it is a great honor to act as Beelzebub's caretaker. Her most characteristic features include her gothic lolita appearance and (as pointed out by Oga's mother) "great big knockers." Oga's family is under the impression that Oga and Hilda had sex and that Beelzebub was the resulting consequence. She prefers that people call her Hilda, instead of her full name.