I want Melisande Shahrizai.
She is extremely intelligent and cunning. She knows how to read people. She knows how to get what she wants. She is a true sadist, but she cares in her own way. For example, she uses aftercare and makes sure Phedre is medically sound. In our world that is par for the course, but peeking into this fictional world and seeing more, it is clear she cares about Phedre. Yes, she sells Phedre illegally, but her intention was getting rid of her as a threat, yet keeping Phedre alive. Given the stakes of the Game of Houses, I do not think selling Phedre was unforgivable. Melisande is human; she has ambition. Phedre’s knowledge threatened her life and she knew she couldn’t trust Phedre to keep her secret. Most people in that circumstance would kill Phedre. It doesn’t hurt that she is described as gorgeous and rich.
I haven’t finished Kushiel’s Dart yet, so maybe Melisande does something reprehensible and unforgivable, but I do not think drugging and selling Phedre counts.
*edit* Gratefulness Day 5: I’m grateful for sadists because they’re the yin to my yang. Plus, if I can accept them as healthy, maybe I can accept myself.