Han's is Skippers nemesis that comes to the tv series in season 2,episode 22,Huffin and Puffin. He later returns back in season 3,episode 4, Action Reaction.
Skipper,Rico, Kowalski, and Private... he basically hates everyone but himself
Han's is a selfish and cunning puffin who cares about no-one and nothing but him self.
He does anything to get what he wants, pretends, kidnaps, traps, so on.