Hairo Kineshi

Kineshi Hairo (灰呂 杵志 Hairo Kineshi) is Kusuo's classmate and is 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 fall down. He is very reliable and is always looking after others or trying to do the right thing. There are times he gets too fired up but in the end, he’s still 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, or 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, although he still has a few areas where he lacks in common sense like not being able to cook/failing to cook. However, even though he’s weird and fired up all the time Hairo is somehow still really popular with all the other kids in class. Hairo was once thought to be gay by Aren and Shun, although its more likely that he doesn't have any thoughts about love.

Trivia

 * His name is a pun on the word Pyrokinesis.