I'd say Ender is certainly Chaotic Evil at this point. Cid, according to the wikipedia descriptions of alignments, was probably Chaotic Neutral most of the time due to his willingness to do what he believed was right against previously established laws or rules.
Weland for the most part was probably Lawful Good and I'd say I usually play Corin as Neutral Good. Edmund is probably Lawful Good right now, though I dont think I've played him long enough to really get a feel for what I want out of him. His wife, Letta, is certainly Lawful Good.
