Haruka Ozawa is a second year student and 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, sd 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. She was always blaming herself for this, seeing as her sister was chasing a ball she threw onto the road. Later, Yakumo reassures her that it wasn't her fault, and shows her an image of her sister, smiling, in the anime.
Haruka seems to have some feelings toward Yakumo, which develop into some kind of crush. But nothing "happens" in their relantion ship besides Haruka saying she never got to tell him her feelings when she believed he was killed.