Haru is mature, level-headed, and kind in almost every way. She is also described as very feminine, as pointed out by Ann. She enjoys helping the Phantom Thieves, as she becomes delighted when she learns that her hobby of vegetable-growing can prove useful to the group's activities. This is because she wishes to be seen as dependable by them, but often worries that she may not be doing good enough, and can be fairly self-deprecating when she expresses that doubt. Haru is shown to be easygoing, very polite to teachers and authorities, and often shows a friendly smile to her peers when talking. She also has a rather refined speaking pattern. Haru can sometimes be playful and teasing as well, but knows not to push limits and is never taken to a serious degree.