Hairo Kineshi

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

Personality
Kineshi can pretty much be defined by three characteristics: Being hot-blooded and energetic, his obsession with tennis, and having his pants always falling 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 Kusuo ’s little group of outcast friends.

History
Kineshi also hangs out with Kusuo and his friends 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 (Although Riki usually wins). Kineshi 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 Kineshi is still really popular with all the other kids in class. Kineshi was once thought to be gay by Aren and Shun, although it's more likely that he doesn't have any thoughts about love.

Trivia

 * His name is a pun on the word Pyrokinesis.
 * His guardian spirit is an highly enthusiastic tennis player.
 * His favourite sport is tennis.
 * His pants drop down every time he falls, showing off his bare bottom, which his classmates use to identify him.