Mahiru is the protagonist of the Servamp series. He is a freshman in high school who likes to keep things simple. He is the eve of Sleepy Ash and the one to name him Kuro. On his way home from school, Mahiru finds a black cat laying exhausted on the street and cannot move due to the heat so decides to take the cat home, giving him a bell and naming him Kuro due to its black fur. He quickly learns that the cat is actually a vampire, a Servamp called Sleepy Ash. Mahiru's mother died at a very young age. There was no mention of his father, and he didn't have any close family members to take care of him. His uncle, Toru Shirota, decided to take him in and raised Mahiru himself. However, his uncle was very busy and had to spend days away from home because of his work. Mahiru grew up alone and took care of himself. Because of this, he taught himself basic housework, such as cooking, cleaning, and sewing.