I love this topic lol I explained this in another post. So, I'll just copy & paste it here. They explain in the second season that Homura is special. His gender is unstable & because of this, so are his powers as a Sekirei. Both his gender & powers will become stable once winged by an Ashikabi...BUT...his gender rests in the hand of his Ashikabi. Also, as we all know, a Sekirei's body responds according to their respective Ashikabi i.e. in Homura's case, if his body reacted to a female, his gender would be male & if his body reacted to a male, his gender would be female...BUT that can all be changed if his male Ashikabi wanted Homura to stay male & vice versa. Since Minato didn't specify & instead just told Homura to stay as he is...he's stuck as a woman. You can see it through his/her outfit. She has breasts & she is a lot slimmer & somewhat taller. Hope I explained it well enough :)   See 2 other replies

and shes kinda conceited callin herself a goddess   See 2 other replies

well he is a dude but for some reason grew boobs then turned back into a dude again   See 2 other replies