This is a squirrel. He is usually sad, because he lives in the closet... of the building he shares with Claire and Yuu. And also because he is allergic to nearly all nuts, peanuts as well, despite the fact that a peanut is not actually a nut. It is a legume. Or so I've heard. Sadly, despite his allergies he is very much fond of nuts and would love to eat any he sees in the area. Or anything that resembles a nut, really. Poor, poor Shawn S. Squirrel.