Throughout the series, Mondo becomes a prominent member of the main cast of characters, known for his brash personality and his tendency to act on his impulses. He is often seen clashing with the other students, particularly the Ultimate Moral Compass, Kiyotaka Ishimaru.

He wears his hair as a dark-brown punch perm with a styled-1960s pompadour. His pompadour is approximately fourteen inches when compared with his shoulder width which can be estimated to be around fourteen inches. 