User blog comment:Sgt. S.S./If you could bring any dead character back to life in Skyrim, who would it be?/@comment-1080767-20121010044858/@comment-4113369-20121013190935

Well, s/he left with an expedition heading for Akavir and never returned. If s/he were canonically either a vampire or a mer, s/he could possibly still be alive. Otherwise, not likely. By the time of Skyrim, it's already been over 200 years since s/he left.