Haruki is the oldest of three sisters. Legendary voice actor Mitsuo Iwata is her uncle.

In the first grade, Haruki began practicing baton twirling, and kept at it for ten years. She has been in the acting and theater industry since her third year of middle school. Her appearances include Alice-in-Project stage productions, commercials, dramas, and music videos. She is described as optimistic and she is often seen smiling or in high spirits.