So there have been a lot of speculations about the new character that Isayama claims holds the “key” to the story:
And I’m sure other people have stated this, but I’m thinking he’s Annie’s father.
First off, we never got to see Annie’s dad’s face. Isayama hid that from us in all of Annie’s flashbacks and I doubt it was due to laziness.
Authors always obscure a character’s face for a reason. Either Annie’s dad has already been introduced in the story and Isayama doesn’t want us to recognize him, or when he does introduce him, he doesn’t want us readers to know he’s Annie’s father.
This would be also be yet another way to bring Annie back into the story, since we know she has to come back otherwise our harsh Isayama would have just killed her rather than crystallizing her. And since Annie was a Titan shifter, obviously dude new some information at least. He definitely isn’t completely in the dark. SO having a great deal of the answers would make sense.
Now a lot of people have been saying that it’s possible that Annie has already eaten her father so that can’t be true, but I’d argue that she ate her mother, hence her father’s harsh treatment and later apology. Just a guess. Something else could be the case.
Also, though the two characters seem to have different hair styles (in the Annie flashbacks the guys has straight hair and this new picture it’s curly), Isayama has been known to…change up some hair styles in the past. Suddenly change up the hairstyle halfway through a volume. (I’m lookin’ at you, Jean. Ymir). And plus, there’s a big time skip here. Annie’s like, what, eleven in these flashbacks? This gives the dude plenty of time to make his hair nice and scruffly. Grow a beard. Let himself go. You know.
But it’s just a theory. Isayama will answer all in due time. DUE TIME JUST NEEDS TO BE FASTER. Ahem.