Name: Carmilla
Series: Castlevania
Generation: Lord of shadows 2
Kiss/bite Effect: poison then control
Contact Method: Direct
The protagonist gabriel/dracula (re)meets Carmilla and she offers to him her blood
https://youtu.be/BcPlbtT07kU?t=25s
then he is cursed by it and can become her slave for eternity if he have only corrupted blood in himself while being attacked
https://www.youtube.com/watch?v=lRLSS0hd2IM
if not, carmilla can tricks him by taking the form of his wife and let him suck her blood once again in order to control him forever.
https://youtu.be/BcPlbtT07kU?t=15m29s
"she was using her blood to make him loyal to her and her alone, showing a very dangerous obession."
[first post on this forum even I'm visiting it sometimes since a while, hope you appreciate it, carmilla is a perfect femme fatale]