Actually, Moritz did a little description of different daimons on the wiki already. Not sure how many people noticed that. There he finally described that Screamer has avian features.
Most of the daimons' appearances Garret doesn't actually know. And really, why would he? Just because he's ambassador for the Zuma Coalition doesn't mean he's not justifiably terrified of them and would much rather communicate from a safe distance.
Well, the real reason is mainly because no one asked. Usually the GM describes what the daimon that's doing the roleplaying event looks like. Sometimes it's pretty clear what the daimon probably looks like (You know, with a name like Flame...)
Poll