User blog comment:Ktrfgfg/Chapter 53 and chapter 54 predictions/@comment-103.18.29.162-20140210040709/@comment-24.217.239.232-20140305044639

What if Historia is Eren's sister? It makes sense, they both look a lot alike.... I mean, think about it- Eren and Historia are having similar flashbacks of this lady that looks an awful lot like Eren's mother, and if Historia's father was actually Eren's dad, then it could be possible that they're half-siblings.