She can decide though, that's what I like about her. She's a general but she also wants a companion as well, like every other women in the world. She's not a one dimensional villain, she's an animal. She grew up like an animal in the wilderness, and she's at the top of the world in AGK, nobody can really do anything against her. Simply because she understands that power governs the world. She's at the place right now where sasuke is trying to get, everyone hates her but has to bend over and take whatever she gives them, because no one can do anything against her.
Sadism isn't really a big thing for any manga antagonist, it's been done way too much. But esdeath is definitely one of my faves, she's interesting none the less. Her personality is the perfect imbalance that creates a problem.
*Shura is shit teir, everything he did was to please his father in hopes of being in power. Esdeath would be high tier. She learned at a young age that only the strongest survive, and the weak get no sympathy. Everything else came to her by living that way.