I feel like that heavenly king's personality perfectly expresses what a lot of people with too much arrogance are like. She just barges in and tries to take what isn't her's with basically her reason being because she has the power to do so. Then when she gets shut down by someone with greater strength and moral integrity she immediately becomes submissive until the chance she can stab them in the back. Obviously none of this is working out for her, which I am quite happy about, but if this heavenly king's character was a little more fleshed out then I think she'd be a great antagonist. So here's hoping she gets some backstory before she loses her arrogant qualities.
Thanks for the translation Magnos!