Charlotte
She was originally a human, and became a vampire after a past lover turned her into one, all under a fake promise of eternal love. After the transformation, her lover abandoned her, leaving her confused and in pain. Ever since then she completely changed, becoming a whole different person. She has emotional issues, manipulating other women's feelings, not taking relationships seriously and only looking for fun to satisfy her inner void and avoid feeling as powerless as she felt when she was left alone, she needs to feel in control or she will spiral down into despair. She's selfish and possessive, won't hesitate to manipulate or take advantage of others as long as it benefits her. She won't physically hurt a woman though (unless it's consensual). She despises men and has probably killed one at some point of her life.
She's in a relationship with Lilianne who reminds her of her past self. She loves her a lot even if she's not one to show it in conventional ways. Others might describe this relationship as toxic, and it most likely is, but for the two of them, it's where they feel safe.