I recommend the two novels, My Exclusive Blood Slave and The Heartless Charmed in The Hitman's Time Travel Series. " My Exclusive Blood Slave " was an ancient romance novel. The female protagonist was a mutant vampire from the future. As a killer, she was ruthless and cold-blooded. The male protagonists loved her and listened to her very much. " The Hitman Also Transmigrators: The Heartless Bewitcher " was also an ancient romance novel. The female protagonist was a top-notch assassin who had never had a master. The male protagonists also loved her and listened to her words. I hope you like my recommendation.