Jeff is the one of the main characters in Clarence.
The only thing squarer than Jeff's head is his personality. He is a well-organized fountain of knowledge (mostly trivial factoids). Jeff wants to be a social butterfly, but he's too cautious to spread his wings and there's that long list of phobias to consider. Clarence's infectious enthusiasm offsets Jeff's fears and hang-ups; he can't help but have a good time when Clarence is around. Well, as long as it doesn't involve being dirty, sticky, wet or touched by ungloved human hands. Jeff is the cerebral third of this trio.
Jeff has a round but squarish head, with brown hair, a bright cyan t-shirt and tan yellow shorts. He wears very tall socks, along with dark blue sandals. He also seems to be very skinny.