So here’s an interesting ponder I had: what if Blue Diamond, with her immense grief and self-loathing, got into a relationship with a human. A toxic one. One where he routinely belittles and degrades her, mocks her weakness and her stupidity, dangles brief and fleeting moments of love and kindness just so she believes there is good in him and imperfection in her. Reveal how diamonds are frail, easily shattered and broken, and that diamond is probably the weakest gem in all the universe, and that only in serving him can she find true strength…and true love. All of this so she will do whatever he says, without debate or question, so he can use her legitimate power to conquer Earth…and perhaps, one day, all the Universe.
Kinda like these two lovebirds.