Haru is a girl who likes Tsuna and attends Midori Middle School, an elite school known for its difficulty in getting accepted. Initially, she admired Reborn but shifted her affection towards Tsuna after being saved by him. She enjoys taking care of children, often looking after Lambo and I-Pin. Haru frequently uses English words as adjectives when speaking. According to Tsuna and Gokudera, adult Haru has become more feminine in appearance, but her thought process remains the same. Additionally, she is the third person to take the Dying Will Shot in the series. In her free time, Haru enjoys cosplaying and wearing unique outfits.