He was trained severely by a Kung Fu master, whom he succeeds, learns to utilize his chi (basically making him into a human slaughterhouse). Has a twin brother with a swastika on his hand, who uses telekinetic powers, and a fanatic father who claims to be God.
When heated up, his fist (possibly his body too) may exude an aura, and his eyes may even release a thin steam.
Among his feats are knocking elephants down, defeating a man aided by internal wires, moving a nuclear reactor's control rods, dispatching an undead with his body heat.
It may be obvious, but he is inspired by Kenshiro, hero of the Fist of the North Star/Hokuto no Ken series. But he also uses chi like peeps in Dragon Ball (but uses the Kamehameha-like Kantsuu Reppa very VERY sparingly).
"...Pass on to the next life!"
"This brother will turn your bad karma into ash!"