Plagg is a god of sorts who enables Adrien (our other speaker here) to transform into the destruction-wielding superhero Chat Noir. This works better when Plagg has recently eaten. Plagg is also a cat and acts like it, and given the choice, he will eat only cheese.

(I suspect the specificity of his canonical tastes is largely because Adrien's bank account can take the hit and if that were not the case Plagg would express a preference for some less spendy kind of cheese, but that's sorta not the point.)

Glad you liked!