Mitsuya Takanashi

A popular and handsome high school student. He has feelings for Iroha and often flirts with her in hopes of making her his girlfriend. He views Tsutsui as his rival and is incredibly jealous of him to the point where he spreads false rumors about him.

Takanashi was initially snobbish, deceptive, and arrogant to the point of ruining Hikari Tsutsui reputation just so he could have a chance with Iroha Igarashi by spreading rumors that Hikari was a lolicon. Later though, after witnessing the gravity of his actions, he begins to feel a bit of remorse and eventually apologizes to Hikari's family along with his younger sister who assisted him with this act. He eventually begins to tag along with Hikari and his group of friends more. He begins to act more like a friend to Hikari as the story progresses and starts to care more about Arisa Ishino, although he continuously denied it that this hints he is having feelings for her and plays into the "tsundere" trope.

Post time leap he gets married to Arisa Ishino and they have a child