The Dentist

From the text:

When Curt Lemon was killed, I found it hard to mourn. I knew him only slightly, and what I did know was not impressive. He had a tendency to play the tough soldier role, always posturing, always puffing himself up, and on occasion he took it way too far. It's true that he pulled off some dangerous stunts, even a few that seemed plain crazy, like the time he painted up his body and put on a ghost mask and went out trickor- treating on Halloween. But afterward he couldn't stop bragging. He kept replaying his own exploits, tacking on little flourishes that never happened. He had an opinion of himself, I think, that was too high for his own good. Or maybe it was the reverse. Maybe it was a low opinion that he kept trying to erase.