I would definetly go for Keeli as the Prettiest, your right, having her in just one episode after all the work they must have put into her is crazy! The same goes for the two Imperial cyborgs that you only see in the last couple of episodes who work along side the Imperial Master. Ugly is a bit more difficult. Zelda probably does win hands down, but I found most of the puppets in Terrahawks human and Alien to be fairly creepy looking. Again the Imperial Master's council members were pretty ugly with one of them looking truely disfigured, although He's actually one of my favorites.Shane.
I like parties, I like fun, I want to live in a hamburger bun!