Haru is a third year student in Shujin Academy and the daughter of the current president of Okumura Foods, Kunikazu Okumura. While Okumura used to genuinely care for his daughter, by the time of the events of the game began, he grewn so corrupt and over-ambitious that he is willing to do anything he can do to gain absolute power. She didn't mind at first despite Okumura was overworking employees, but she eventually became a bargaining chip for his ambitions, in which she has been forced into an arranged marriage with the son of a prospective associate of her father's, Sugimura for the sole reason that his status will allow Okumura to achieve presidency. While arranged marriage itself issues no problems in Japan, Sugimura was a highly abusive, abrasive and controlling playboy who sees no issues in polygamy, effectively putting her well-being at stake. During the Rank 10 Confidant hangout with her, it was also revealed that Okumura fabricated the marriage contract privately with several loyal board members and some executives within the company had never heard about it.

She is first seen during the Hawaii trip. In Royal, however, she can be seen as soon as the first day of school on the third floor, and she might be seen walking behind the protagonist to school during several days.