A villainess I could get behind. She's cunning, charming, and cold. The perfect combination for a person wanting to serve revenge.
I do feel bad about the original owner of the body because your girl was going through it. I didn't like how they invalidated her, but I guess those kind of thinking does fit the characterization of the protagonist. In connection to that, I liked how her attitude stayed true during the whole series. She was mean through and through. She knew what she wanted and manipulated her way to get it.
I also loved the nice sprinkle of smut and the puppy-like leads too. The scenes are drawn really well and it was very pleasing to read hehe.
Concentration of Malice