Board Thread:Anime/@comment-26056057-20161018072627

Hey so, I might be being crazy here. But who is this character in the second opening? The logical conclusion would be that it is Mikasa because of the scarf, but her and Armin frame the picture right after so I don't think it's her. I thought maybe it could be Eren (because of his two friends), but what's with the scarf? Also the hair looks way longer than his. What is this? Please tell me I'm not missing something super obvious.  