Luska and his hillbilly teeth.

... he's actually pretty insecure about that. Most of the time he forgets about it when he's not looking at himself in the mirror, but if someone points out what out-of-the-row teeth he has, he'll surpress smiling for days and hold a hand in front of his mouth when speaking. Not that he's the kind of person who smiles a lot, anyway. Not until he deserts, that is.

His self-confidence isn't stellar, nobody would suspect that though as he comes across rather extroverted and talktive. In fact, he talks a lot (mostly asks people a ton of [not so unpersonal] questions in some interrogating fashion, which usually doesn't sit right with whoever he talks to and it can be both pretty intimidating and invading)

He doesn't really know how to people.

From 2013