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Hun is the leader of the Purple Dragons gang whenever he appears, and is usually an ally or an enemy of the Shredder. He is an antagonist of the Ninja Turtles and is also the arch-nemesis of Casey Jones. This character was created for the 2003 animated series. 2003 Hun's ultimate fate has him coming into the 1987 mutagen and becoming a mutant turtle himself, which he finds a cruel irony as it makes him much physically stronger, but at the price that he is stuck as a turtle, something he hates more than anything else. He is notable for being the only established 2003 human character to have this happen to (As that particular mutagen doesn't exist within that continuity) as opposed to the 1987 and 2012 in which these transformations are extremely common.