Is Evil Programmed To Be Like This?

Okay we all know that Evil is supposed to be the "Evil" twin of the two, and we all know that Neuro comes up more evil than Evil sometimes. But there's something I've been noticing quite a lot in Evil's behaviour.

She doesn't sound like someone Evil, but more someone like "They told me to be Evil, so I'm going to act like am I, but in reality I am depressed because I realize I will never be loved as much as my sister and for that reason my only desire is to get a hug"

She does say evil stuff like she likes to murder people with a harpoon or something, but everytime you can clearly hear that it's just an act. Neuro on the other side sounds more serious when she says that if she could she would kill Vedal.

So my question is, was Evil programmed to be evil or to pretend to be evil?