Botdf fans band member question?

I don't know for sure. I'm a HUGE fan of Botdf though. The only members right now are Dahvie Vanity and Jay Von Monroe. Garret got kicked out for basically being a douchebag. I've seen them live and they never have a girl singing with them up there. However I do know what you mean about the girl voice in their songs. It could be a guest singer, so unimportant they don't credit. It could be one of them with their voices edited. Or I have a theory it could be Dahvie's girlfriend. She's always the merch girl at their shows and I wouldn't be surprised if she made an appearance in songs. However I have no evidence to support that theory it's just a theory. But as for the band it's just Dahvie and Jayy at the moment.