Haruka is a second year university student. Her twin sister died in a car accident when she was seven years old which she blames herself for, seeing as her sister was chasing a ball she threw onto the road. She asks Yakumo to save her friend Miki from demons possesing her. She is the first person who is not frightened of Yakumo's different eyes or his ability to see ghosts. She even says they are beautiful, as Yakumo's uncle once predicted. Because of Yakumo, she is able to see her twin sister who died in an car accident when she was seven years old.
Haruka seems to have some feelings toward Yakumo, which developed into some kind of crush.