If Harrow's going to be in the graveyard, there's a high chance that she might run into Alucard there. (His own effects will be mostly centered on changing into his wolf or bat forms.) I don't know how much trust he's already built up, but he would be willing to help all things considered.

But I am also 200% up for haywire necromancy because that just sounds like Alucard's normal life.