The villainess loves is a common trope in comics, movies and TV shows. “The villainess loves” is a common trope in the movie industry and has been used as a shorthand for an evil character who turns into an angel of mercy at the end of the story.
The villainess loves is the evil character who doesn’t care about her evil deeds and just wants to lay down her life for the good of others. In the context of stories like Batman: Arkham City, this is a common trope. And it makes sense, because these kinds of characters are often motivated by altruism and don’t want to do bad things in order to get whatever they want.