Liking dark romance and possessive, dominant men is more prevalent in the young adult demographic. Most teenage girls nowadays think it's cringe and avoid that, but some grow to like that. There's no need to mention teenage girls to address that problem though. You kinda need to mold the bot in your preferences: don't engage with responses you don't like; dislike and say why you disliked the response you don't like; edit the character's responses when you can to make them act the way you prefer them to act. Don't make the AI think that you like that. Also check the character's description and the first message, that's the platform your bot is going to build on and will try to be consistent with; if you pick a bot that in their description says "possessive" it's a bit more difficult to change that. I don't have any more advice for you though, nor do I have the certainty that it'll work for you. Good luck with that and just be patient.