Chatō

is a member of the MK5.

Mobichi Arc
While hanging around in the stairway to the rooftop, Chatō and the other members of the MK5 celebrate the fact that they have recently completed a special technique which they believe will help them gain recognition amongst their peers. Suddenly, Furuichi enters from the rooftop, annoying Chatō who tells him to die for scaring them. Furuichi takes on the MK5 and Shimokawa, defeating all of them with ease. Shocked, especially after hearing Furuichi's response as to why is so powerful, Chatō and the others beg for him to take them on as his disciples.

Return to Ishiyama High School Arc
After months of reconstruction, Ishiyama High School is finally rebuilt, allowing all of the students to return back.

However, upon the MK5's return to the high school, they are all defeated and cleanly buried into the concrete wall that surrounds the campus, which Oga and Furuichi discover sometime after.

Trivia

 * Each member of the MK5 is named after a member of Japanese rock and roll band and comedy group The Drifters. Chatō is named after the drummer Cha Katō.