Fitts-senpai let out a 'Mmmmm' and was thinking about it with his hand to his chin. It seems to be a habit of his to bring his hand to his chin when he thinks. It might be because of the sunglasses, but it looks awfully uncomfortable. Incidentally, when he's awkward or embarrassed, he'll scratch his cheek or behind his ears. It's an action that's quite suiting of his age, and suits him really well. However, since elves are long-lived, he might not be as young as he seems.