If the lore isn't an issue for you, I don't see why you can't just make your character's motivation to find someone and use that to create interactions. A weird looking guy spouting crap about sucking blood approaching every young girl he sees might bring issues in itself, but that's part of the fun: you don't know what's going to happen.
A NPC would better serve you than another person who might not go along with the big plot you've got planned out. Plenty of people RP without giving too much of a shit about lore, you just need to put it in your search info so people who are strict with the lore know to avoid you.
A NPC would better serve you than another person who might not go along with the big plot you've got planned out. Plenty of people RP without giving too much of a shit about lore, you just need to put it in your search info so people who are strict with the lore know to avoid you.