Board Thread:Theories/@comment-27821571-20161016203622/@comment-29958651-20161017122430

Although it isn't death, we still don't know what happened to Samuel Linke-Jackson (aka The Guy saved by Sasha and then never seen again) :-) But we can expect him to be dead after all.

Annie being comatose... Eh, quite a mystery.

The Strange Case of Lady Ymir is still open too.

Honourable mentions: Sasha (being heavy wounded, could have died during exploring basement?), Dina Yeager (if she would be proven to be Smiling Titan, than the mystery is over, however, as for now, her current status is unknown)

Crazy fan theories honourable mentions: Erwin (isn't he a Shifter after all?), Petra (undisputable evidence of her wedding with Levi makes her alive again), Bertold (as a sort of metaphysical being trapped inside Armin's mind) :-)