Seeing as the campaign staff aren't jumping at answering this one, I'll take a crack at it.
I know that Pedro has made multiple references in the past to having a Cadician character. He made comments recently about the character being a two weapon fighting dagger type who also has archery, not sure what archetype etc. Pretty sure that in the 3.5 campaign the character was a holy champion of Cadic.
Henry, on the other hand, I don't know if he even has a character...I'm not actually sure that he
plays Arcanis (but I hope he does). I'm confident that he would be Coryani, and a worshipper of Illir. I've always suspected that Henry would lean towards an 'old legionnaire' type of character, grizzled and worldly. I suppose you could argue that most NPCs we've encountered (and several we haven't) are his characters

I'm afraid that I don't have a clue when it comes to the rest of the PCI staff. I vaguely remember asking James about that a number of years ago, and if I remember correctly he just said something about not having a lot of time to play.