A Steven Universe AU Fanfiction
Prologue: Betrayal

The Earth.
A few weeks before invading forces from Homeworld arrived.

"How's the Earth, Lapis?" I asked through the communication link in the ship.
"It's OK, but nowhere as nice as Homeworld," she replied with a breathy laugh. "The beings that inhabit this planet aren't terribly bright."
I laughed. "So I've heard. I'm almost in your solar system, so I'll pick you up in a few days OK?"
"Actually, I think I'll stay a bit longer. It's peaceful here, and it's nice to get away from Homeworld now and again. You would know most of all, right?"
"Eh, I dunno. Sometimes I miss Homeworld. Especially when I stop by in some unfriendly galaxies."
We both laughed.
"Well, I guess I'll be talking to you later. Keep in touch OK?" Lapis asked.
"I always do. Moonstone, over and out."

The Earth's Solar System.
5 700 years later.

"Are you sure that we're going to make it to the Earth's Moon?" Blue Quartz asked.
"Don't worry Blue, I'm a trained professional. I know how to steer a Gem ship with my eyes closed," I smirked and smoothly guided us past Mars. "Look, were almost there! I can see the Moon from here. And wow, look at that. It's in prime position, as I told you before."
"OK OK. You don't have to be such a know-it-all," Blue muttered.
"Sorry, but it's my job. Anyways, if the Gem I'm looking for really is on Earth, we're going to need some information. It's been a long time since I've been to this solar system, and yet it's my favourite one. Isn't that weird? I think we should come here more often. What do you think Blue?"
"Whatever you say, Moonstone," she replied obediently.
I expertly landed the ship next to the Diamond Base and shut down the ship. We both donned our space suits before exiting the ship and making our way across the Moon's surface to the entry of the Base. We used our Gems to light up the dark interior of the Base.
Once we were inside, I couldn't help but gasp at the beauty of the four murals that decorated each wall; one for each Diamond.
"Oh wow, this is an old Base," Blue Quartz said dismissively. "They still have Pink Diamond here, as well as the old Authority symbol."
"They're ... beautiful," I smiled.
A sudden sadness and embarrassment swept over me as I looked over at Blue Diamond's mural. I had broken away from her court and her control, gone rogue with my Quartz warrior and was on a course to Earth to find a Gem that I wasn't even sure was still there. To top it all off, I had no idea whether I was being followed and I was anxious to ditch the ship somewhere in case Homeworld was tracking it somehow.
"Moonstone? Is everything OK?" Blue asked me.
I put my game face on and nodded. "I'm fine. Let's get to the control room."

"Peridot!"
"What? I'm coming!"
Peridot walked past me and I caught sight of the crystal from the chair in her hand. She kept walking and followed Garnet down the stairs. I frowned and followed her out of the control room.
I began walking down the stairs, but I was stopped by Garnet stopping in front of Peridot and I.
"What's going-" I began to ask, but I was interrupted by her hand over my mouth.
A faint voice drifted up from the mural room. "Let's get to the control room."
"Who is that?" Peridot asked in a whisper.
"They're coming up the stairs!" Amethyst hissed.
"Hide!" Garnet ordered and fled behind the weird floating orb in the centre of the second floor. We all followed her and crouched down to avoid being spotted.
"OK, so all we need to do is find where she is. That shouldn't be too hard, right?" the voice asked. It was getting closer, as well as two pairs of footsteps.
"Sure, if you know her exact coordinates," another voice scoffed. "Are you sure that she's even still alive?"
"I'd rather not think about that, thanks Blue."
We all shrunk back as two Gems made their way up the stairs. One was a bit shorter than Pearl, and wore a dark grey space suit decorated with blue diamonds. The other one was huge and muscular, not unlike Jasper, and wore a similar space suit to her friend. A large blue gem shone from her right forearm, which flexed as she moved up the stairs.
"I'm missing the point of this mission, Moonstone," the larger Gem, Blue, scowled. "Why don't we just go back to Homeworld?"
"Because we can't, in case you haven't caught on," the shorter one, Moonstone, said irritably. "We're just going to find our Gem and then we'll figure something out from there."
"Her name is Moonstone," I whispered, and then was silenced by more hands over my mouth.
The huge soldier stopped and looked towards the direction of the orb. She squinted her eyes into slits and frowned.
"Hey, what's the hold up?" Moonstone asked.
Blue's eyes scanned the room. I could feel Peridot shaking from behind me.
"Nothing," Blue said and kept walking up the stairs. "I thought I heard something."
"Then let's get moving before someone finds us," Moonstone added before following Blue up the stairs into the control room.
We all relaxed as they both moved up the stairs and into the control room.
"We'd better move. They won't be up there long once they find out the panel's broken," Pearl said in a low voice and began to usher us towards the exit.
"HOLD IT!"
We spun around to see the huge Quartz soldier standing at the top of the stairs with a Gem destabiliser in her hand.
"Go!" Garnet shouted and we all fled towards the exit.