Komiyan! *keeps fangirling in check*

I think it would be extremely cool to see their character arcs (even if it's not really... them). But if you'd rather keep us guessing, I guess I can't really do much

Regarding alignments, I think fluid is definitely best. You're never able to put surefire alignments on people in real life, so it seems like there's a rule here: the more complicated and "real" a person/character is, the more fluid their alignment is likely to be.

But alright, back to guessing. For prestige classes, I think:
Gort Blackguard; though that doesn't explain how he can cast spells - his wisdom just can't be in the positives
...
All right, I'm out of ideas. Damn me and my only-core interest in D&D!