Evan is dominant in that he needs you to know you are below him, if you fight him too much he’ll just leave. He believes he is above everyone with no hesitance or doubt and you will learn to agree if you’re going to spend any time close to him. Whether it’s sexual or romantic or platonic or even professional, you will learn. He’s not like regulus or Barty, he can’t bend himself backwards towards a facade of weakness for the sake of a safe place for vulnerability, he doesn’t have vulnerability.
Regulus is dominant in that he needs to control every aspect of your life or he will kill himself. You don’t have to know that he controls your life but you do have to conform to it and you do have to be happy about it. He truly believes his love for someone means he has a claim over them. (It’s one of the many traits and beliefs he inherited directly from Orion.) He’s not like Evan where he needs to own you, but you need to need him.
Barty is dominant in that he needs you in arms reach at all times and if you try to run he will chase you until you either put him down or he puts you down. He doesn’t want to control you, he doesn’t want you to need him, he needs you to want to stay. He’s not like regulus where he needs you to submit to him, he needs you to choose him every time without wavering. No matter what he puts you through, what you put him through, you will be forever if you stay.