Board Thread:Improvements and Issues/@comment-4725729-20150810191246/@comment-11051098-20150810233326

There is no evidence that Giselle is male other than Yumichika's comments, and that cannot be considered any proof. For all we know Kubo did that just to troll us.

Giselle looks female, behaves female and considers herself to be female. I'd say she remains female until Kubo states otherwise.