Colon

Colon is a second-year student. In the band, he plays guitar. He's very passionate about video games. When Riinu meets him, they play a fighting game together. When he loses, he makes a scene.

Colon has a somewhat childish personality. He often speaks his mind without thinking much, like when he calls Nanamori boring. He likes to tease people, but he has a good side and doesn't have bad intentions. On the beach, Colon gives Riinu an emerald he found.