Haruka Kiritani was the runaway daughter and heir to a prestigious noble family residing in the Kitai region of Yoru. As a child, Haruka had a difficult time smiling even when she was happy, and over time this developed into a feeling that she wasn't quite made for inheriting her family's fortune. As a result Haruka left of her own accord, attending the Royal Institute of Magic and later living with her childhood friend, Minori Hanasato. She worked with the witch Shizuku Hinomori and Airi Momoi.