Haruka was a member of the nationally famous idol group ASRUN. Her incredible charisma made her the most popular member of that group, but unfortunately, it was disbanded. She goes to Miyamasuzaka Girls Academy, same as Minori.

In Minori's words, she is "the kind of idol who is able to give everyone hope for a better tomorrow". She is a strict and dedicated person, working in regular routines of rigorous workouts to stay at an idol's standard. However, due to her overly diligent nature, she has difficulty relaxing and giving herself a break. She restricts herself on sweets and pastries, which, in response, causes cravings. She is attentive to the schedules and specials of pastry shops.