I don't know - doubles would be interesting. Especially considering they'll go through totally different character development.
You could have Alys in the RPG still, and eventually kill her before the end. Because this is an alternate universe, none of our characters are really guaranteed survival (except Irvine, but he also won't be finishing the quest with the rest of the group)
I for one won't have qualms about killing some of my characters if appropriate. And at least half of them are doubles.