Bill/Ten
Yep, you've been forcibly added to the Dark Side. Now you get to make these human decisions too.
I think even if there was a female regeneration, at this point, I absolutely couldn't look at him any other way. There's drama and unpleasantness anyway - different kind but still.
Especially when I'm afraid he might be working with the Monks... They've been using him as a propaganda machine. They changed everyone's memories but I can't imagine they changed him that much. It's just... Terrifying.