Nakatsu has a crush on Mizuki without realizing she's actually a girl, which has led some classmates to assume he's gay—something he's apparently made peace with. As Umeda points out, he's really just responding to her feminine qualities the way any teenage guy would, though he's noticeably more enthusiastic about it than his peers (who either aren't affected or keep it better hidden). He gets jealous of Sano pretty easily, given how close the two are with Mizuki.
On the athletic side, Nakatsu is genuinely talented at soccer and got into school on an athletic scholarship. He's from Osaka and speaks with a thick Kansai accent, using local dialect pretty regularly. He's got bleached blonde hair that's pretty distinctive.
Content compiled by AnimeList.moe from publicly available sources.
