Disclaimer: I do not own Steven Universe created by Rebecca Sugar.
For Homeworld
Prologue
The rebellion led by the gem Rose Quartz sparked a change for Homeworld. The idea of cross gem fusion was still unknown to many. Some gems sided with Rose but those that didn't go with her were quickly silenced.
The Great Diamond Authority saw this a problem and worked on ways to win. The Diamonds had many humans and traitorous gems captured. They were then experimented on.
Many gems and humans perished. The Great Diamond Authority's goal was to create a hybrid in secret to destroy the leader, Rose.
Out of all the subjects, only two made it. The two gemstones were Aquamarine and Girasol. Both hybrids being trained in the ways of battle was the original mindset.
The discovery of them being babies placed the plan back many years. Due to their limited knowledge of humans, the pair was raised as gems.
Out of the two gem hybrids, Aquamarine proved to be a great warrior. While Girasol became a great general. When it came to fighting the rebels the two refused.
The Diamonds saw this coming. During the pairs' creation, the Diamonds had a shard placed in them to get rid of their free will and mercy.
Girasol was the weakest and never considered a threat. Aquamarine was the main primary focus. When the Great Diamond Authority activated the shards, only Aquamarine's functioned while Girasol's was unresponsive and somehow destroyed.
With Aquamarine's free will gone, no one stood against them. But that was short lived. The two gems were soon gravely injured and forced back into their gemstones. Three years passed before they reformed, but as infants yet again.
The cycle of training, fighting and reforming continued until the final hundred years of the war. The Diamonds then decided to contain the pair and hide their presence from all.
When the war was finally ended four gems on Homeworld discovered them by accident. The Great Diamond Authority wanted these gems shattered to keep their secret hidden.
The four gems fled Homeworld, but not without taking the two hybrids with them. The only hope they had was the failed to be established Earth colony.
During their escape, one of the gems were separated from the other. They agreed to meet back up once they found Rose Quartz. That is where our story begins