Hairo Kineshi

Kineshi Hairo (灰呂 杵志 Hairo Kineshi) is Kusuo's classmate a hot-blooded and energetic boy. Hairo is the class representative of class 2-∭. Due to his kindness and leadership, he's well-trusted by his classmates.

Background
In the first couple volumes, Hairo can pretty much be defined by three characteristics: Being hot-blooded, his obsession with tennis, and having his pants always falling down. He’s very reliable and always looking after others/trying to do the right thing. However there are times he get too very fired up but in the end, he’s nice to everyone-even to Saiki ’s little group of outcast friends. He also hangs out with them occasionally, but not as frequently as Riki/Shun/Aren. At some point, he starts to one-sidedly consider Riki as his rival, thus constantly challenging him to all sorts of sporty challenges (Riki usually wins though). Hairo is one of the more normal, reasonable characters in the manga, he still has a few areas where he’s lacking in common sense like not being able to cook/failing to cook but even though he’s weird and fired up all the time Hairo’s somehow still really popular with all the other kids in class. Hairo was once thought to be gay by Aren and Shun. but its more likely that he doesn't have any thoughts about love.

Trivia

 * His name is a pun on the word Pyrokinesis.