Inaba Naho♀

Naho is the protagonist's step-sister and a first-year student at the private Seiseki Academy. She followed in the footsteps of Touya, who left home a year earlier, and enrolled in Seiseki Academy. Unlike her extroverted step-brother, she has a very introverted personality. However, she is able to express her feelings honestly to her family, especially Touya. She is also extremely shy, and her parents were hesitant to send her away from home, but at her own request, they allowed her to enroll on the condition that she would live with Touya. Due to a physical characteristic, the asymmetrical color of her eyes, she was often bullied as a child, and people still worry about her to this day.

[From Getchu]