There are two types of Gryffindors. There are the ones like Ron who tend towards Hufflepuff (these are usually my boyfriends. Or else they are pure Hufflepuff. Or Slytherin. Though one time I dated a Ravenclaw and he was soooooo boring) and then there are the ones like Harry who, with their strength and power, could risk becoming Slytherin! But you know they never will! Because they are sooo Harry Potter!
Kevin is the latter. Though he looks like he could silently judge you standing there in the corner with his poofy French hair and sweater. And then make you feel so bad about yourself that you try to hide it by acting extra whatever the lame way you were acting.
But no. He uses his power for good. Like making all his friends dress up as the nativity scene or making art with French magazines from the 50s or dressing like a gay to be more fashionable even though he risks the verbal abuse of other Parisians (they are sooo Slytherin)