Tatsuya Kuruma

Tatsuya Kuruma is a character in the manga and anime series World Trigger. He's the leader of Kuruma Unit.
Kuruma is extremely well-tempered and tolerant, known for never having gotten angry. When Betsuyaku boiled all his tropical fish to death, despite his grief, he promptly forgave the clumsy boy.
(Source: World Trigger Wikia)