User blog comment:Madman97/You know what really grinds my Wabbajack's? S3E1: I can't kill these guys/@comment-25109952-20131025182427/@comment-1600847-20131107005936

When I say "Killable only at a certain time" it means they become killable after their associated quest is done, like what was used in Oblivion. I fail to see how that's mumbo-jumbo.

Really, "protected" would be bug free? Because I've seen bugs posts on forums where "protected" characters ended up dead anyways. From personal experience, I was married to Ysolda and she died in a dragon attack on Whiterun. Whereas I have NEVER seen an "essential" character die. If there is a way they can die, then a bug is always possible. Unkillable under any circumstance like in "essential" isn't.