User blog comment:XGlass Reflection/Ch. 54 Review~ Erwin of the Rebellion/@comment-118.136.106.200-20140213075624/@comment-12642484-20140213200103

The author did not state at anytime, that she has no gender, but he effectively said that it is free to the interpetation of the reader, even if the reader wants to interpret it as Hange changing her gender every chapter (lol). Also have you seen the chapter before this one? I could clearly see round breasts. Seems he actually was serious when saying that her gender changes every chapter :D

Oh and I also saw very unproportional bodies in general in SnK. So maybe it is just that: Inconsistent art, which would not be anything new coming from Isayama.