yes, she is
actually she is more insecure than you think
she wants validation from others because she wants to feel like she can be accepted somewhere because she has such a hard time in real life, and when she doesn't get it this leads to one of the main reasons of her arguments, this gives her relief knowing that she has hurt someone else to show that she is dominant, and letting others see that lets her know that she is feared :), but yes, she also does have fun with hurting others.