Hun’s criminal career began at a young age; during his teen years, he was already a prominent member of the Purple Dragons street gang, and was responsible for the burning down of Arnold Casey Jones’ (Casey’s father) store, as well as his eventual death. It is during this time that the the Shredder, realizing his potential, takes him under his wing, training him as his protégé. At the beginning of the series, Hun is second-in-command of the New York faction of the Foot, as well as leader of the Purple Dragons (although he leaves its day-to-day operations to people like Dragonface). During the City at War arc, where New York’s underworld is fractured due to The Shredder’s presumed demise, he leaves the Foot and takes direct control of the Purple Dragons, until he is informed of his master’s true fate and returns to the Foot. A more definitive split occurs in season 4, after the Shredder’s true identity as an Utrom is revealed and he is exiled: with the Shredder gone, Hun turns to the Purple Dragons, successfully remaking them into a Foot-like organization.

Hun is a lethal fighter, surprisingly agile and skilled with a multitude of weapons (although he prefers to use his fists). He is also quite smart, as evidenced by his success in running the new Purple Dragons. However, his power level, as it is, has been inconsistently portrayed throughout the series: although sometimes he is able to hold his own against all four turtles, at others, he is able to be defeated by a single fighter. Generally, he is defeated more easily the later he appears in the series, presumabely due to the turtle's increasing skills.