Hey quick question

If I bring out Eddard Stark (for example) and he dies. Am I not able to bring out another copy of Eddard later in the game.

Also if I've got one duplicate Eddard and the first dies. Can i bring my third out as a duplicate. Thanks

A deceased character cannot be marshalled back into play. A discarded one can. As far as the second question, if I'm understanding correctly you want to know if you have eddard in play with a duplicate and you've discarded that duplicate to save him could you then still play a duplicate on him later and the answer to that would be yes.

If you have a duplicate on Eddard, and save him, the duplicate goes into your Discard pile (not the Dead Pile). You MAY play a Unique card if a copy is in your Discard pile. You CANNOT play a Unique card if a copy of that card is in your Dead pile.