Perhaps because of your multiple alters you fall somewhere on the genderqueer or nonbinary spectrum. (I'm only suggesting, the only person who can truly decide and understand your gender is you )

Being both but neither. That is a feeling I am quite familiar with. Gender is an odd and fluid thing. And society forces us into these small boxes or masculine or femme. And that's it.

But It's all about how you feel and what you need. Your gender can be anywhere on a large spectrum. It can even shift and change with the passing of time. I have a friend who is genderfluid. They mostly are femme, but go through masculine and neutral days as well.

I'd recommend looking at some nonbinary identities and seeing if they describe what you feel. That's what I did.