Fuck it, and fuck you. I'll tell you how to fix Dominator.
Wander and Wander-esque things are the worst thing to try and help her with. She detests positivity and overwhelming compassion and all that hokey shit. Overexposure will make her bitter and even more hate-filled than she already is. There is nothing and nobody underneath the blood-bursting rage that secretly wants to be choked by love. She displays her true feelings front and center. Dominator will never be happy with a Wander.
What you want to do is give her a friend. Someone she would actually like when she got to know them (definitely not Wander or UG, read above) and enjoy shooting the shit with, and someone she could talk to about her feelings and things she's thinking of, and someone that she could cry on every once in a blue eon. Because what Dominator wants -more than anything in this universe- is not to be alone, not to be doomed to trying to converse with automatons and sitting all by herself in her battleship.
And guess what? After a while, she won't try and derive happiness solely from planetary destruction. She'll be more emotionally mature. She'll reap the joys of social bonding and companionship, and it will show. Will she become a good person? No. She'll still get off to violence and be a dick towards people for fun. But she won't be AS awful, and with someone like Dominator, that is a godsend.