Thoughts that would endanger the lives of any humans are inhibited and not allowed, for obvious reasons, but other than that she pretty much has free will. She will only attack humans in self-defense using the taser built into her hand (she can secretly overclock it due to an unaddressed vulnerability in her mechanics that her creators do not know about, but she's never had to get to that point). She is also very protective of her hairpin and may attack anyone who tries to steal it, as it is her first possession (it's actually a fridge magnet).

In fact, she was created with the inability to even feel anger at all, only minor annoyance. However, she ended up adapting her own form of it over time and simply "learned" the emotion, which is why her angered expression looks very off (she does not feel the emotion the same way we do). It's possible if she was able to learn that she could one day learn more things she isn't supposed to, but there aren't any signs of this happening.