Eh, I could go either way on the subject. It could be fun to have Slee go first or not; on the one hand, she and Sorn could have a fun dynamic as partners from the beginning and having her see more of the world as part of everyone else's adventures could be cool, but then at the same time it'd be fun to have some of the other characters present when she's discovered.

Maybe it would be best to have some of the characters with 'quicker' backstories up first? I like that everyone gets an adventure, but one or two characters (Dengi in particular) seem like they could be convinced to sign on relatively easily. Just a thought.