Ok. ... Random idea. This is my first warhammer rp of any kind, so I'm new but...

Could I play as a "lost" grey knight that you happen upon? I could make it work, but the only issue I forsee is that he'd probably want to annihilate the <censored> out of Ritske, the chaos tainted mutant mercenary. 

Or, perhaps you could use this conflict between them as a really "fun" into to our characters, opening as a battle between them. Will it fly?