Question (Spoiler) - End of Eotn

What happens if you don't take the draknor key (for end game item)..
and why does gwen have a close box (click) in her dialog box?

he wants u come back later? i dunno lol

I guess you do the mission again and get it when you want the end game weapons.

for the droknars key, if you dont get it, i guess you can come back after you kill the estroyer again but its 1 per character