My Integra/Alucard over time fic is coming along nicely. It's only at about 600ish words, but I have the rest of it planned out. I added a memory where Integra asks Alucard if he is a boy, and Alucard's response is, "Once I was." This discussion continues, and Alucard pretty much tells a little girl that he's not a boy or a girl technically, because he is a monster. Except the conversation isn't that blatant.
I'm in your Hellsing filling it with queer.
Note, I do think Alucard would consider himself more male-ish (since his default/self forms are mostly masculine presenting), but like he says when he turns into girlycard in London, it doesn't really matter what shape or persona he is in. How I interpret this is all body shapes and gender are equally "Alucard," since he's technically made of a lots of souls. The dominant one definitely considers itself more of a "he" though.
What I'm probably going to finish first is my Marriage of Convenience fic, which is also going to be a fill for the Unconventional Courtship challenge. It's writing fics to the plot of assorted Harlequin novels. I'm doing a Integra/Seras AU that takes place [Spoiler (click to open)]in a world where Integra is a Lord and she has lost her husband/consortish dude (Alucard). This is a metaphor for the time he is gone for 30 years.