Kanna Tomita
About
A girl in Kaoru's class. She's the daughter of the main family on the Eastern side of the mountain, and has a (much) older brother who works in the city. Though other kids call her the "rich girl of the countryside", she's not the type to show off her wealth. She gets along well with Kaoru, even if she's a bit aggressive towards him. She was already upset at Kaoru's lack of interest in hanging out after school with his classmates, but those feelings have recently grown stronger due to the stress of other girls being around Kaoru.
(Source: the manga's character introductions)