Reiko
Reiko holds a lot of sway in Kimito's class at Seikain Jogakkou—she's the first-year representative and basically the face of the student body. She's the one who greets Kimito when he first shows up at the academy, making her one of his earliest connections there.
Like pretty much every other rich girl at Seikain, Reiko is fascinated by anything to do with "commoners." She doesn't really understand that world, but that's exactly what makes it so captivating to her. It's one of her defining traits, honestly—that mix of total ignorance and genuine intrigue when it comes to normal people's lives.
Content compiled by AnimeList.moe from publicly available sources.
