Which character surprised you by dying and not coming back?

Nowadays, it's not really a surprise any more when someone dies and then comes back to life. Death is a revolving door, in both science fiction and fantasy. But which dead character did you most expect to see come back — only to watch them surprisingly stay dead forever?

Please include a picture or clip of your most shocking non-resurrection.

Top image: "The Night Gwen Stacy Died" by alijamZz/Deviant Art.