Kagine

Kagine-sensei is a high school physical education teacher at Karakura High School. He's muscular, severe and very strict. He became angry when Ichigo skipped out on class to go see Don Kanonji from TV and because none of Ichigo's classmates stopped him. He grew uncomfortable when Rukia started crying, this enabled Ichigo's friends to escape as well, angering him even more.
In the anime during the Bount saga, Kagine makes another appearence talking to the students about sports.