There are unique dwellers and legendary dwellers. Both come with dwellers with high stats in specific areas and good outfits, but of course the legendary dwellers come with awesome outfits and great stats. I have one, he's some old dude from Fallout 3 according to my friend.
Dwellers always return to their assigned stations after incidents are taken care of unless they died and were revived, then they wander around the vault until you re-assign them to wherever they were.
Dwellers always return to their assigned stations after incidents are taken care of unless they died and were revived, then they wander around the vault until you re-assign them to wherever they were.