say i got winter solider as my main character. if i use kingpin's underworld boss ability
1) if winter has wounds on him, does it transfer to kingpin?
2) do i use kingpin's main character card now or the kingpin supporting card as my main character
1) No, they don't transfer. You leave WS and KP exactly as they were before. Except now Kingpin counts as your main character and WS counts as one of your supporting characters. (Note: Winter Soldier can still level up even though he's a supporting character.)
2)You use the supporting card.