Buu

is a member of the MK5.

Appearance
Buu is immense and muscular with long hair.

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. Buu is named after the lead guitarist Boo Takagi.