I think that the core of it is that Anita likes being able to kill with no real consequences to her, she likes getting attention for it and doesn't really care what kind of attention it is as long as she gets to feel superior to everyone else. She is the opposite of an assassin in attitude (that requires some knowledge of stealth and not being noticed).

It isn't just what she says, but what she does. She barges into places and demands respect without ever bothering to earn it first. She never seriously considers finding other employment. She doesn't bother to take care of herself because she has the harem to do it for her.