I mean, they can’t control what becomes a meme. They made 1 shitpost about Bowser becoming the waifu since he couldn’t get one, and the Internet lost its shit

Eh, depends. Vampires are often associated with beauty and sexuality. As mentioned, Dracula himself is often a stud nobleman. Then you have Carmilla, the whole bathing in blood of virgins to stay young, vampires having innate abilities to charm people, the simple idea of associating the drinking of blood with the exchange of… other fluids. It's all fairly romanticized.

Granted, it's usually depicted as a facade of beauty and noble airs, that hides the monster beneath. But most vampires tend to not look like Nosferatu motherfuckers. And of course, that they are indeed evil, undead creatures, but that doesn't stop people.

Especially when monster-girls have been rising in popularity over the years. Plus her own inherent appeal as a giantess, milf and will dom the fuck out of you. Capping it off with the juxtaposition that this is supposed to be a horror game, but everyone's just horny.