Monta is a wide receiver on the Deimon Devil Bats American football team who resembles an ape, particularly a chimpanzee. Despite being as short as Sena, his large hands, arms (which are longer than his legs), acrobatic moves, and leaping ability make him an effective receiver. He can even catch Hirumas bullet passes with one hand. Monta has a habit of posing every time he makes a spectacular catch for a touchdown, rolling after the jump, and breaking out of the roll by kneeling and pointing upwards with his index finger. He also attaches Max to nearly everything he does (suffixing his phrases with MAX! in Japanese and prefixing them with MAXI-! in English) because he believes one should give 100% effort in all endeavors.
Monta was named after Sena mistook his name as Rai Montarou, but he prefers being called Monta after Hiruma tells him the nickname Monta was supposedly derived from Joe Montana. Although Monta does not know that Joe Montana is a quarterback and not a wide receiver like himself, he has a crush on Mamori and tries to win her heart, often failing miserably because she gives more attention to Sena.
Monta's throwing and kicking are incredibly horrible; his throws usually hit someone on the head or break a window, while his kicks are similar. Monta is also known for his bad grammar, but he gives wonderful motivational speeches, especially to Sena when he feels like all is lost. Despite being considered an idiot, Monta has a heart of gold and tries his best in everything he does.