User blog comment:The Milkman/Random Rambling: Another Assassin/@comment-5280592-20120919224310/@comment-4237253-20120922235050

He's not killable. No plot holes.

Also, Sheogorath mentions doing every single guild quest, pretty much admitting he's the Hero of Kvatch from Oblivion. Lucien came back, so why not this kid, who is alive for everybody?