User blog comment:Xxkiiroxx/"Marco is Alive" Theory/@comment-4929778-20150818170710

i think annie did kill gunther. i mean, how would reiner or bertolt leave to kill him without getting detected. Plus, maybe she just had different clothes she wore so she wouldnt be detected. If you read the manga, the assaliant looks more feminine, in the anime, i think it was done that way purposely to make the identity look more ambigous.

As for Marco, i can see one of these scenairos happening

1. Marco got partially eaten by a Titan, maybe he wasnt on his guard, maybe he tried to kill one, but he got grabbed. Annie needed the gear to kill Hange's test subjects, so she took his and hid it somewhere. She snuck in, killed the test subjects, and used Marco's gear, before getting rid of it.

2. Annie needed gear from somebody so she saw Marco and stabbed him with her blades and stole his gear, before leaving him for the Titans.

3. Annie took Marco to a place where nobody would see or notice, then she transformed (if you go by goodbye wall sina, annie partially transforms without nobody noticing so maybe she did that) and killed him. She then left the titan and made his body look like the Titans got him.

4. Annie stole his gear and left him to the Titans while he was alive.