Okay, so those that watch me know about my "Dark Moon Serenity" idea.
For those that don't, here's the basic run-down:
Prince Diamond succeeded in brain-washing Usagi, creating Dark Moon Serenity, codename Peridot. Then Wiseman got his hands on her and further "tainted" her. However, the combination completely backfired on them both. Dark Moon Serenity basically took over the Dark Moon Kingdom and built herself a harem. In it are Prince Diamond, his brother Prince Sapphire, and Prince Endymion (renamed Prince Azure).
She has a kid with each of them - The one holding her wrist is the eldest daughter, Princess Topaz. Her father is Diamond. The purple one is the youngest daughter, Princess Amethyst. The one that looks like Wicked Lady is Azure/Endymion's daughter, Princess Garnet.
Topaz hates them all. She is Wiseman's tool, and wants nothing more than to destroy her mother and her half-sisters.
Garnet hates Amethyst, all three father-figures, and Topaz. She is loyal to her mother only, and harbors less-than-familial desires for the woman (similar to Chibi-Usa wanting to marry Mamoru).
Amethyst, by contrast, loves/likes everyone but Garnet. She feels threatened by Garnet.
DM!Serenity isn't truly capable of love, but she does like Amethyst and Garnet the best. Of her harem, she's not all that fond of Azure/Endymion, had a great sexually charged relationship with Diamond, and is content with Sapphire.