Rose/everone else fusions! lil bit about all of them:

Corundum is fairly difficult to maintain, but her immense strength and size makes the difficulty of her fusion worthwhile. She combines Rose’s kindness and wisdom with Ruby’s fighting spirit and Sapphire’s self control, and she tends to be courageous, resourceful, energized and always in a good mood. A combination of different traits give her a perky sense of humor more snarky and clever than that of her components.

Morganite is a nearly perfect fusion and easy to maintain. However, she has trouble remembering that she used to be two people and has been caught more than once trying to escape from the rest of the team, wanting to be her own person. She’s mostly useful briefly after fusing, while Rose and Pearl are still in control, but becomes less and less motivated to do anything at all the longer she remains fused and the more she manages to repress her components. Dreamy and philosophical, she’s often lost in bouts of melancholy.

Spodumene is the fusion who retains the most of her components’ individuality. She’s easy to maintain, as she defaults to Rose’s personality if there is a disagreement - Amethyst trusts her leader’s judgment more than she trusts her own. Spodumene combines Amethyst’s sass with Rose’s warm social skills, and her extroverted, transparent personality doesn’t make interacting with Spodumene much different from interacting with Rose and Amethyst at the same time. The only unique traits the fusion has is a more sensual, almost flirtatious attitude and the occasional sinister threat directed at enemies (which is never carried out, as Rose is able to contain Amethyst’s destructive instincts).

They’re all fusions of the current Crystal Gems’ looks and personality + Rose, which would be impossible, obviously, so this is just AU stuff. They’d all be a lot smaller and dorkier nowadays, what with Steven having the quartz-gem. They’d probably all be human-sized and -shaped too.