AshenLorx

Even that is wishy washy as best beacuse Japanese description of the acessory just said "Legendary Corrin". No "child of dusk" stuffs.

I still think it's male. Some people pointed out that the difference between Normal Marianne on new heroes banner and cheerleader Marianne with Hilda lead on summer banner was just 3 months. Halloween banner right now would also be 3 months after Legendary Byleth. Maybe an alt may not mean another alt too soon but backpack on a duo might be fair game. Also there's also the fact that if FByleth gets two duos, it sets a precedent that MByleth would also gets, even if not two, at least one duo. And I don't really see IS doing four or three duos with just Byleth again and again.