Yama

Yama (which is Japanese for mountain) is (was) a Bot Fight Champion before Hiro Hamada took his title and destroyed his bot 'Little Yama' in his first fight.

Personality
Yama is a bit like a Bot Fight bully as he kept on winning and using his bot to destroy other fighters' bot, other fighters hid and pulled their bot's head off so he wouldn't pick them as his next fight. They laugh when he laughs and they backed off as he made his way to make Hiro pay for beating and tricking him into 'paying' more money for the (rematch) next round. Wanting to beat him and Tadashi Hamada up is what got him and his men behind bars. (When they got out is unknown.)

Yama was cast as a Mob Boss and main/sub villain before the story line for the film changed.

Powers and Abilities
Tricking fear in bot fighters at the Fights with his mountain size body and bot.