Cleric or Rogue

[Mustrum_Ridcully]

Since Coolness goes first, I would take the Cleric

Mustrum Ridcully

 

[Kae'Yoss]

I'm not certain what a Fey'ri is, though I'm certain they have lots of neat powers.

A fey'ri is a tiefling descended from gold elves and demons (mostly succubi/incubi). And they have quite a lot of powers: Most elven bonuses plus spell-like abilities, especially alter self at will (human forms only, and no time limit), and a list of powers from which they can choose 4 (and some of these are pretty powerful, so only one of those can be chosen, and it will increase the level adjustment).