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Diamond Greg

Fandom: Steven Universe Future

Created: 6/20/2026

Tags

AU (Alternate Universe)FantasyScience FictionSpace OperaDivergenceCharacter StudyAdventureCanon Setting
Contents

The Sound of Violet

The ocean was a mirror of perfect, impossible blue. Greg Universe sat on the edge of his unmade bed in the back of the van, the familiar weight of his acoustic guitar resting against his thigh. The air in Beach City was particularly sweet today—salted by the tide and warmed by the afternoon sun. He took a deep, sharp breath, letting the calm settle into his lungs, and exhaled with a long, peaceful whistle.

"Not a bad day to be alive, Greggy," he muttered to himself, reaching up to adjust the rearview mirror so he could catch a glimpse of the horizon behind him.

But as his eyes met the glass, the breath he had just released hitched in his throat.

His eyes were wrong. The warm, dark pupils he’d seen in the mirror for decades were gone. In their place were two glowing, violet shapes—perfectly symmetrical diamonds.

"Whoa!" Greg scrambled backward, his heels catching on a stray toolbox. He tumbled over his own feet, landing hard against the side panel of the van with a metallic *thud*. "What the—what is that? Some kind of light trick?"

He scrambled back up, his heart hammering against his ribs like a trapped bird. He fumbled with the hem of his sweatshirt, his hands shaking so violently he nearly ripped the fabric. He pulled the shirt up, expecting to see a bruise or perhaps a strange rash from some weird space-flower Steven might have brought home.

Instead, wedged perfectly into his belly button, was a gemstone.

It was deep, regal purple, cut into a sharp, multifaceted diamond shape. It pulsed with a rhythmic, low-frequency hum that Greg could feel vibrating in his very marrow.

"No. No, no, no," Greg hissed, his voice cracking. "I’m a human! I’m a guy from Jersey! I don’t do the glowing rock thing!"

He hooked his fingers around the edges of the gem, bracing his feet against the floor of the van. He pulled. He twisted. He grunted with the effort until his face turned a shade of red that rivaled a sunset. The gem didn't budge. It felt as much a part of him as his own spine. When he pulled too hard, a jolt of cold, static electricity shot through his nerves, making his hair stand on end.

Panic, cold and sharp, finally took hold. He didn't think; he just scrambled into the driver’s seat. The engine roared to life, and the van peeled out of the parking lot, tires screaming against the asphalt as he sped toward the beach house.

Greg practically fell out of the van before it had even come to a full stop. He took the stairs to the porch three at a time, his chest heaving. He didn't knock; he threw the door open with a crash that echoed off the high ceilings of the temple home.

"Steven! Garnet! I’ve got a... I’ve got a situation!"

The scene inside was not what he expected. Steven, Pearl, and Amethyst were huddled near the warp pad, but they weren't alone. Standing before them was a Gem Greg had never seen. She was tall and slender, draped in sheer, flowing silks of deepest violet. Her skin was a pale lavender, and her hair was styled in two elegant, swooping loops that resembled a stylized crown.

Steven was the first to turn. "Dad? Is everything okay? We’re kind of in the middle of—"

Steven stopped mid-sentence. His eyes drifted down to Greg’s midriff, where his sweatshirt was still bunched up, exposing the glowing purple stone. Steven’s face went pale, his jaw dropping in a silent 'O' of pure bewilderment.

The stranger—the violet Pearl—turned slowly. The moment her eyes landed on Greg, her entire demeanor shifted. The regal, distant expression vanished, replaced by a look of such profound, tearful relief that it looked like she might shatter.

Without a word, she snapped her heels together. She brought her arms upward, crossing her forearms over her chest to form a diamond shape with her hands—the salute Steven had described from his terrifying trips to Homeworld.

"My Diamond," the Pearl whispered, her voice like the chime of silver bells. "You have returned. We have searched the void for eons."

Greg froze, his hands hovering awkwardly in the air. "Uh, hi. Hello. I think there’s been a huge mistake. I’m Greg. I play guitar. I’m very much not a... whatever you just said."

He turned a desperate, pleading gaze toward Garnet. The fusion stood as still as a statue, her three eyes hidden behind her visor, though her mouth was set in a thin, grim line.

"Garnet, please," Greg begged. "Tell me I just sat on a very shiny piece of glass and it got stuck. Tell me I’m not turning into a jewelry store."

Garnet stepped forward, her heavy boots thudding softly on the wooden floor. She placed a steadying hand on Greg’s shoulder. She didn't look surprised; she looked heavy with the weight of a secret that had finally caught up to the present.

"I was hoping this timeline would remain a possibility rather than a certainty," Garnet said quietly. She looked at the others, her voice dropping into a somber register. "There was a period in the earliest days of the Diamond Authority that has been erased from every Pearl’s memory and every mural on Homeworld. Before the rebellion, before Pink, there was a Fourth. But she was not like the others."

"Another Diamond?" Pearl gasped, her hands flying to her mouth. "But that’s impossible! The Great Diamond Authority has always been three, then four, then three again! There is no record of a Purple Diamond!"

"Because White feared her," Garnet explained, her visor shimmering. "Purple Diamond didn't represent light or form or emotion. She represented Resonance. The ability to harmonize and amplify the power of all other Gems. She was a catalyst. On her own, she was formidable, but in the presence of others, she was more powerful than even White Diamond herself. She was the 'Sound' that gave the universe its vibration."

The Violet Pearl nodded fervently, her eyes never leaving Greg. "The others grew jealous. They feared her influence over the colonies. They attempted to... re-tune her. But she chose to dissipate instead, scattering her essence into the vacuum of space to avoid being used as a weapon."

Steven looked at his dad, then at the gem, then back at his dad. "So... the essence? It found Dad?"

"It didn't just find him, Steven," Garnet said. "It chose him. The resonance of a Diamond requires a host with a certain kind of soul. Someone who understands harmony. Someone who lives for the music of life. It’s been dormant in his lineage, waiting for the right frequency to manifest."

Greg felt a strange heat beginning to radiate from his center. It wasn't painful, but it was overwhelming—a low, thrumming bass note that seemed to sync up with his heartbeat. As the realization settled in, a faint, violet aura began to bleed out of his skin, shimmering like heat waves off a desert road. It carried a weight with it—a sense of ancient, crushing authority that made Amethyst instinctively take a step back and caused Pearl to stand a little straighter.

"I can't be a Diamond," Greg said, his voice trembling even as the aura around him grew brighter. "I’ve got a car wash to run! I’ve got a van! I can’t rule a galaxy, I can barely keep track of my spare change!"

The Violet Pearl stepped closer, sinking into a deep, graceful bow at his feet. "You do not need to rule, My Diamond. You simply need to exist. Your presence alone restores the chord that has been broken for millennia."

Greg looked down at his hands. They were still his hands—tanned, calloused from guitar strings, a bit weathered by age—but they were glowing with a soft, ethereal light. The air around him felt thick with power, a silent hum that demanded attention without saying a word.

"Dad," Steven said softly, reaching out to touch his arm. As soon as his fingers brushed Greg’s skin, a gold and pink spark jumped between them, and Steven’s own gem began to glow in sympathetic vibration. "I think... I think the universe just got a lot bigger."

Greg looked out the window at the ocean, the same ocean he had been admiring just an hour ago. It looked different now. He could hear the rhythm of the waves not just as sound, but as a mathematical harmony. He could feel the vibration of the Earth beneath the house.

He took a breath, and this time, the exhale didn't just whistle. It resonated.

"Well," Greg sighed, a wry, panicked smile tugging at his lips. "I guess this is one hell of a career change."
Contents

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