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Velvet and Ash in Blue

Summary:

A Sonic fanfic.
[Sonadow fanfic V.0.1]

It started like any other fight—Dr. Eggman’s pesky tactics, battling new injuries, and rivalry. But when a darkness from Shadow’s past claws its way into the present, everything changes. Forced into a fragile alliance, Sonic and Shadow face deadly trials that push them past their limits—and closer to each other. As their world spirals into chaos, something powerful sparks between them. Not rivalry. Not friendship. Something far more dangerous... and far more real.

Notes:

Warnings/Notes:

Upload Time: N/A
[16 Total Chapters, 5+ Bonus Chapters]

Warnings: This reading involves the following — Sonic ships, mild homophobia, bullying/cyber bullying, trauma/ptsd, blood + mild gore, fighting/death, and potentially more.
[DNI if you’re uncomfortable with these]

Song Recommendations: In a variety of chapters, you will see song(s) recommended to be played as you read the chapter:
(Example: Song “Blank” by Blank is recommended for the best experience)
Sometimes, you’ll see a double song recommendation (meant to be played back to back):
(Example: Song “Blank” by Blank and “Blank” by Blank is recommended for the best experience)
It is a feature I decided to include to help the reader(you) feel the mood, although it is optional.

Bonus Chapters: Bonus Chapters are exactly what they sound like, more chapters after the main story has reached its “end.”
(A continual to the story that doesn’t effect the main story)

Warnings for Bonus Chapters: This reading involves the following — Sonic ships, alcohol, trauma/ptsd, 18+ scenes(kissing, dirty talk, sex, edging, orgasm, etc)
[DNI if you’re uncomfortable with these]

SONIC IS MADE FOR A MATURE AUDIENCE (8+ without parental supervision/guidance)

Chapter 1: Fractured Ego

Chapter Text

Velvet and Ash in Blue



Prologue: The Beginning (Original)

 

“He’s too strong!” Tails shouted breathlessly, his fingers trembling as they scrambled across the controls of his Miles Electric. Sparks flew nearby, and the deafening sound of battle nearly drowned out the soft pinging of his device’s warning alarm. Normally, when the whole crew was together, they were unstoppable—but of course… a certain blue-furred hedgehog was nowhere to be seen.

 

Amy sprang in from the left, landing in front of Tails with graceful precision. Her back was to him, her stance grounded and firm despite the chaos erupting around them. “I can smash and dodge, but I don’t know how much longer I can do this for.” Her voice was strained as her grip tightened around the handle of her Piko Piko Hammer. She swung fiercely, taking out another of Eggman's smaller robots in a single crack. “Got any ideas on Sonic’s whereabouts? We could really use some help here!” She punctuated her words with a grunt, blocking a heavy hit just in time with the flat of her hammer.

 

“Did I hear somebody say my name?” came a cocky voice from a blur in the distance.

 

A whirlwind of blue zipped across the battlefield and skidded to a stop beside them. Sonic’s signature smirk curled across his face, his fur glinting under the sun, his eyes alight with the thrill of combat. The familiar scent of ozone and scorched metal filled the air around him.

 

Sonic! ” the group exclaimed in unison.

 

“Took you long enough,” Amy muttered under her breath, clearly unimpressed. She turned her irritation onto the nearest robot, slamming her hammer into it hard enough to leave nothing but bolts and scrap in its wake.

 

Sonic easily took out another bot mid-stride, landing beside Knuckles with a practiced flip and casual shrug. “Nice hit, but where were you dude?” Knuckles asked, eyeing him with a mix of relief and irritation. Sonic had a notorious habit of arriving fashionably late to high-stakes fights, and the crew, though used to it, was still bothered every time.

 

Sonic brushed off his shoulders, then stood a little taller. “Oh, y'know me, getting a late lunch snack.” He rubbed under his nose with a grin, fully aware of how ridiculous his excuse sounded. As the others stared at him in disbelief, he cracked one eye open and chuckled. “What? You can’t blame a guy for getting hungry!”

 

“Enough with the chit chat, robot!—Attack!” came the unmistakable, booming voice of Dr. Eggman. He hovered above them in his flying saucer-like contraption—the infamous Egg-O-Matic—its engines whirring with menace.

 

…Stomp.

 

…...Stomp.

 

Stomp!

 

Sonic slowly lowered his gaze to his red shoes, their surface gleaming in the harsh sunlight that spilled over the treetops. A shadow passed across his face as he squinted at the trembling ground. Something wasn’t right. His eyes widened, and he snapped his head upward, scanning the skies until he found Eggman leering down from above.

 

When his emerald eyes locked onto the doctor, something in them flickered—tension, suspicion, fury. He clenched his fists so tightly, his gloves strained at the seams. “What did you do this time, Egghead!”

 

“Oh ho ho, just you wait…” Eggman replied, voice dripping with madness as he erupted into crazed laughter. “This is my finest creation. I have spent years creating just you and your little furry friends.” He chuckled darkly, his gloved hands clasped tightly as he leaned forward, practically drooling at the prospect of watching it all unfold.

 

“What? Too afraid to come down here and face us?” Sonic called out, his voice cutting through the air like a blade. His distaste for Eggman's cowardice burned hot—why start a fight he never had the guts to finish himself? “Tch, scaredy-cat if you ask me…” he added under his breath, just before another violent tremor rattled the earth beneath them. Sonic instinctively dropped into a battle stance, senses sharp and alert.

 

Through the smoke and splintered trees ahead, a shadow loomed.

 

A monstrous, metallic giant burst into view, stomping its way toward them with mechanical menace. Its humanoid hands were massive, knocking down pine trees like matchsticks. Its titanium-plated armor gleamed like a war machine forged in fire, and not even the force of a crashing tree left a dent.

 

“Of course it has a mustache,” Sonic muttered, unimpressed. “What’s next, it’s undefeatable?” He shifted his weight and placed a hand on his hip, glancing sideways at his teammates.

 

All eyes fell on him with exasperated expressions.

 

Before any of them could respond, Eggman’s voice returned, shrill and triumphant. “Enough of this, attack these puny rodents!”



---



Darkness.

 

A crushing, suffocating void replaced the battle’s chaos. All sound vanished—no explosions, no shouting, just… silence. An eerie stillness swallowed everything whole.

 

Then, a high-pitched ringing pierced the void.

 

Sonic’s eyelids fluttered open. Everything was spinning. The world was a distorted blur of light and sound, and for a moment, he wasn’t sure where he was. His head pounded with a dull, rhythmic throb, and he instinctively reached for it. That’s when he realized Tails was crouched beside him, panic etched deep into every inch of his young face.

 

“Sonic? Sonic! Are you okay?” Tails was shaking his shoulder, desperation cracking his voice.

 

Sonic blinked hard, trying to clear the haze clouding his mind. Seeing Tails like this—so afraid—it twisted something deep inside him. He’d never seen that kind of terror in his friend’s eyes before. It chilled him.

 

“I’m fine, buddy,” he lied with a strained breath, forcing himself to sit upright. His muscles protested, but he shoved the pain aside. The battle wasn’t over.

 

Then it hit him.

 

A jolt of searing pain tore through his right leg, stealing the strength from beneath him. He collapsed again, teeth clenched in agony. But he didn’t let Tails see the panic in his face. Instead, he locked eyes with his friend and gave him a firm look—don’t worry. Even though every nerve screamed in protest, Sonic couldn’t stand the thought of looking weak.

 

He gritted his teeth and pushed himself back to his feet. The pain was brutal, stabbing with every movement, but he wouldn’t let it stop him. He scanned the battlefield again. Amy and Knuckles were still up, still fighting… but barely. They were exhausted, bruised, and outnumbered.

 

Sonic’s hands curled into fists at his sides, his knuckles white as he limped forward with fiery determination in his eyes.

 

“Hey, Metalhead!” he shouted, his voice rising above the chaos. “Stay away from my friends!”

 

His teammates turned in shock, their expressions full of disbelief as they saw him moving, despite the clear injury.

 

Fueled by adrenaline and sheer willpower, Sonic pushed forward. His legs moved faster, building speed until he was a blur again. Time seemed to slow, the world shrinking around him as he launched into the air. Blue lightning licked around his body as he reeled back his fist, charging it with every ounce of power he had left.

 

“Take… THIS!

 

 

Sonic struck.




Chapter 1: Fractured Ego (Original)

 

Knuckles had casually texted Sonic earlier that week, letting him know he was helping a civilian move into their new place. He mentioned he could use an extra hand and figured Sonic might be up for the task. True to form, Sonic agreed—though, also true to form, he showed up late. This time, though, it wasn’t on purpose.

 

“Yo, Knux!” Sonic called out, voice slightly strained as he approached from down the street, moving with noticeably less energy than usual. His pace was sluggish, more of a trudge than a jog, his right knee aching with every step. Still, he pressed on—stubborn as always, never one to show weakness if he could help it.

 

Knuckles stood just outside the new house, at the address he’d sent Sonic earlier. A few cardboard boxes sat on the porch beside him, stacked in a way that told you someone had tried, and failed, to make them look light. They were clearly what the two of them were meant to help carry.

 

Knuckles glanced over his shoulder at the sound of Sonic’s voice. His eyes narrowed slightly as he took in the sight of Sonic’s limp, though he kept his tone light. “Hey,” he greeted, one brow quirking upward. “You good, man?” His faint smile softened the question, making it clear he wasn’t prying—just looking out for a friend.

 

Sonic came to a stop in front of him, giving a brief, dismissive nod. “Yeah, why wouldn’t I be?” he replied smoothly, masking the pain behind a casual smirk. “In fact…” He held a beat, lifting a hand for dramatic effect. “I feel pumped to lift some boxes! I guess you were right, Knux. That fight really knocked some sense into me—by sense, I mean energy.”

 

Knuckles let out a low chuckle. “Heh, whatever you say, man.” With a shake of his head, he stepped over to the boxes—each one scribbled with a bold, messy ‘HEAVY’ in thick black marker. The contents inside clinked and shifted as he reached down to one of the largest. Sonic’s eyes trailed to them and, upon realizing the size and weight implied, he mumbled under his breath with a resigned sigh, “Oh boy…”

 

Knuckles bent his knees and wrapped his arms around the largest box like it weighed nothing. His muscles tensed, but he lifted it with practiced ease.

 

“I grabbed the heaviest one, you can grab the second heaviest one on the right,” he said, his tone casual but organized.

 

Sonic blinked, caught mid-thought. His mind had wandered again—likely from the pulsing pain in his leg. He quickly snapped out of it with a shake of his head. “Right, got it,” he said, masking the hesitation in his voice.

 

He stepped over to the remaining boxes, inspecting each one. “What box did he say to grab again?” he muttered, scratching his chin with a puzzled look.

 

He eyed the box on the left, noticing it looked slightly less cluttered than the others. Shrugging, he crouched and wrapped his arms around it, trying to lift with his back and not his legs—though that hardly helped when pain flared through his knee like a bolt of electricity.

 

“Holy… fu—” he hissed, barely catching the curse between gritted teeth. His body trembled as he strained to lift the box, hugging it to his chest tightly to keep it from slipping and crushing his foot. He winced again, breath shallow. I really need to work out more, he thought grimly.

 

“What’s taking you so long?” Knuckles called over his shoulder, casting a glance back. His sharp eyes picked up on Sonic’s unstable stance right away. “Hey, you okay, dude?”

 

Sonic forced a lopsided smile, his pride kicking in fast. “I’m doing great!” he lied, voice a little too cheerful.

 

Knuckles narrowed his eyes slightly, but didn’t push. He turned back around and started walking, box in hand. Sonic followed suit, his steps uneven and careful, the pain in his leg steadily worsening with every movement—but he kept going, jaw clenched, determined not to let it show.



---

 

“Wrench, please,” Tails said calmly, laying on his back beneath the belly of his beloved biplane, the Tornado. His arm extended out from underneath the frame, palm open in silent expectation.

 

“Wrench,” Sonic echoed brightly, placing the silver tool in his palm. Their gloved fingers brushed for a moment before Tails withdrew his hand beneath the plane once more.

 

Not long after helping Knuckles, Sonic had been roped into another favor—this time by Tails, who needed a hand fine-tuning his aircraft. Truth be told, Sonic didn’t mind. He always saw these moments as a great excuse to hang out with his best friend. When he’d arrived, he’d found Tails exactly where he expected—hiding beneath the plane, legs sticking out and tail twitching every so often with focused excitement. Sonic swore the fox was borderline obsessed with the thing—but he’d built it from scratch as a kid, and that was worth admiration.

 

“Perfect!” Tails beamed, his voice muffled by the undercarriage. “According to my calculations, it should be up and running by tomorrow in no time!” He slid out from underneath the plane with a practiced ease, his fur streaked with grime and oil.

 

Sonic leaned back against the cool, metallic frame of the plane, arms crossed. His gaze flicked to the smudges of dirt on Tails’ cheek, a half-smile tugging at his lips. “That’s great. I’m glad I could help.”

 

“Heh, yeah. I dunno what I’d do without you. Thanks, Sonic.” Tails grinned wide, his tiny canine teeth peeking through. If Sonic looked close, he could see the faint, excited wag of his twin tails between his legs.

 

Sonic's heart warmed at the sight. He couldn’t help but smile even wider. “No problemo,” he said casually, waving a hand before resuming his relaxed stance.

 

Tails got up and wandered toward a nearby shelf stacked with his famously known gizmos and gadgets. Sonic watched curiously as the fox rummaged through the clutter before pulling down his trusty Miles Electric. He padded back toward Sonic, eyes fixed on the device’s screen.

 

“Aw man…” Tails sighed, voice deflating.

 

Sonic pushed off from the plane and limped over, concern flickering in his expression. “What’s wrong, bud?” he asked softly, peering over Tails’ shoulder to catch a glimpse of the screen.

 

“I completely forgot the load outside that I had delivered Thursday. I was supposed to bring it in while I still had the lift… but I returned it on Friday,” Tails explained, ears drooping slightly. “Its weight capacity is ludicrous—it could level a mountain!” He frowned in frustration. “I’d ask Knuckles, but… he’s busy at his reading club.”

 

“Reading club?” Sonic repeated, blinking in disbelief. “Since when did Knuckles like to read?” He leaned slightly to the side, careful not to put any weight on his bad leg, while still sneaking a glance at Tails.

 

Tails just shrugged. “Beats me,” he replied plainly, eyes flicking back to his to-do list.

 

“So… what even is this ‘load outside,’ anyway?” Sonic asked, straightening up and placing a hand on his hip.

 

Tails turned to face him, his tails swishing behind him. “Oh, it’s just a crate filled with lots and lots of screws, bolts, and other pieces I need for my next invention.”

 

Sonic tapped his foot thoughtfully for a moment, a mischievous grin forming. “Why don’t I just help you?” he offered cheerfully—though he silently begged that it wouldn’t be more box-lifting. Spoiler alert: it was.

 

Tails lowered his gadget and looked up at Sonic, his expression turning cautious. “Are you sure you can? I don’t mean to be rude, but… you took a bit of a hit back there with that robot. With your injury… I don’t believe it would be a good idea t—”

 

“I’m fine, Tails. Don’t worry about me,” Sonic interrupted gently but firmly.

 

He knew Tails meant well, but the concern in his voice stung more than he’d expected. It wasn’t just the physical pain anymore—it was the way everyone seemed to know he wasn’t okay. And worse, they were starting to treat him like he was made of glass.

 

That wasn’t who Sonic was. He couldn’t let them see how much it hurt.

 

Not yet.



---



Maybe I really should’ve listened to Tails… I can barely even feel my leg. The thought echoed bitterly in Sonic’s head, each step down the cracked sidewalk heavier than the last. He tried not to limp, but his body betrayed him. His right leg dragged slightly, his body aching beneath the usual cool façade.

 

He approached a narrow garden path that led to a quaint, pink cottage nestled between rows of flowering bushes. The scent of roses filled the warm afternoon air, their vibrant petals spilling color along the walkway. His emerald eyes flicked ahead, locking onto a familiar silhouette in the yard.

 

Amy stood by the porch, her arms folded across her chest, foot tapping slightly in that way she always did when something was on her mind. She hadn’t changed—not in the way she worried, not in the way she stared right through him.

 

“I see your knee still hurts, Sonic,” she said, her tone firm, eyes narrowed with gentle judgment.

 

He hesitated, caught off guard, and then offered a half-hearted smirk, shrugging as he crossed his arms and turned his gaze away.

 

“Oh, come on, Ames. Don’t be like that,” he said, forcing a casual edge to his voice, though pain was already creeping up his spine. “Besides, if I was ‘in so much pain’...” He struck a theatrical pose. “I wouldn’t have walked all the way out here.”

 

Amy let out a soft sigh, her posture easing as she stepped toward him, her expression shifting into something more sincere.

 

“I think the word you're looking for is stubbornness.” Her tone softened, concern taking the place of frustration.

 

Sonic glanced back at her, his gaze uncertain for just a second. “Look, Tails called me to say you were on your way, but he mentioned to me about you limping around constantly. I briefly talked with Knuckles too, he said the same... I know you’re trying to hide it, but it’s not healthy, Sonic. You need to see somebody.”

 

He inhaled sharply through his nose, holding it in for a long moment before releasing the breath. The silence stretched, tension clinging in the air like mist.

 

“…Fine,” he muttered at last. Then, as if needing to regain his edge, he flashed a grin. “Don’t miss me too much. I’ll be back before you know it!”

 

He lifted his right leg—too fast. A sharp pain lanced through his knee, but he masked it behind grit teeth and forced himself into his signature stance. A blue blur whipped away down the street, vanishing in seconds.



---



Ugh, my leg is killing me… Sonic slouched forward as he limped along the edge of a quieter street. His jaw clenched with every step, each movement of his injured limb spiking discomfort through his system. He groaned, eyes fluttering shut for a second before something caught his attention.

 

A dark blur moved in the corner of his vision, a solitary figure seated at a café’s outdoor table. His ears perked up, body pausing mid-step.

 

“Eh... this can wait a little longer,” he muttered, squinting at the unmistakable outline. “Besides, I haven’t seen that grumpy guy in a while.”

 

He allowed himself to lean into the curiosity, the pain becoming background noise. With a forced gait, he approached the coffee shop.

 

“I wonder what he’s doing…” His gaze drifted up to the shop’s weathered sign, then back down to the black hedgehog now rising from his seat, cup in hand. “...here,” he finished with a dry scowl. Not surprising. Shadow loved his damn coffee.

 

Shadow turned, tossing the empty cup into a nearby bin before heading down the sidewalk, his entire body language radiating ‘leave me alone’. His steps were precise, his posture guarded.

 

Then he froze.

 

A grunt slipped out as he abruptly turned to his left, eyes narrowing the moment he saw Sonic.

 

“Oh great, it’s you. What do you want?” His voice was clipped, practically venomous with disdain.

 

Sonic limped into step beside him, pushing himself to walk without favoring the leg. “Awh, did’cha miss me that much?” he teased, leaning in with a crooked smirk.

 

Shadow’s eyes cut toward him, sharp and cold. “I’m not in the mood for your foolish games, hedgehog. Now lea—”

 

“Oh c’mon, sure you are. I saw that look in your eyes—admit it. You missed my presence!” Sonic interrupted with a knowing grin, his eyes gleaming with mischief.

 

“Tch...” Shadow clenched his fists, tension building in his shoulders. “Your presence is nothing but a curse. Your voice alone annoys me. Beat it before I regret not punching you in the face sooner.”

 

Sonic’s grin faded for a beat before returning even wider. “Mr. Scrooge if you ask me…” he muttered, just loud enough.

 

That did it.

 

In a blur of motion, Shadow turned and tackled Sonic to the ground. The crowd nearby gasped, some scrambling to record as the two iconic hedgehogs hit the pavement.

 

Shadow swung a fist—Sonic caught it mid-air, grinning like the devil himself.

 

“Still got it,” he muttered.

 

Shadow’s lip curled in frustration. His other fist came crashing down, but Sonic spun out from under him, skidding across the sidewalk and landing in a crouched pose.

 

His knee screamed in agony. He winced, but forced himself upright, playing it off.

 

“Ha! I didn’t know your old age was catching up with you so quickly,” he taunted, hand on his hip, wiping beneath his nose with a smirk.

 

Shadow narrowed his gaze and burst forward, the two clashing hands in a test of strength. They pressed against each other, muscles locked.

 

“When do you ever stop talking…”

 

“Let me spoil it for you—I don’t!”

 

But the banter couldn’t hide the truth. Sonic’s leg was trembling. Pain clouded his vision.

 

Then—his knee buckled.

 

Shadow saw the opening and took it, lifting Sonic and spinning fast before releasing him. Sonic crashed into a brick wall with a violent thud, sliding to the ground.

 

His breath was gone. His hearing dimmed to a soft buzz. Dazed, he pushed himself upright, just as Shadow stalked toward him, his face grim and unrelenting.

 

Sheesh, is he trying to kill me or something? What’s this guy’s problem?

 

Sonic launched himself at Shadow again, unwilling to back down.

 

Shadow caught him mid-air—his gloved hand locking around Sonic’s throat and slamming him into the ground.

 

Sonic clawed at his hand, his legs failing to kick himself out of his hold.

 

“Cat caught your tongue?” Shadow taunted, amusement flickering behind his stare despite the raw anger burning behind it. His grip wasn’t crushing, but it was firm enough to keep Sonic pinned beneath him, like a warning more than a real attempt to choke him.

 

Sonic coughed, sucking in what little air he could manage as his hands remained on Shadow’s wrist, his gloves scuffed and trembling. “Ngh... You're... heavier than you look,” he muttered through gritted teeth, forcing a smirk even as he wheezed beneath the weight.

 

Shadow’s expression darkened further. “Still mouthing off, even when you’re on the ground,” he growled, voice low and sharp like a blade. “You never change.”

 

Sonic narrowed his eyes, his breathing uneven. “And you’re still... dramatic as hell,” he shot back with a grin, though it flickered from the pain throbbing through his body.

 

Shadow’s eye twitched slightly, the flicker of what once was amusement.. died. He didn’t see the usual fire in Sonic’s eyes. Instead-fear.

 

Why are you holding back? Shadow thought.



Shadow abruptly released his grip on Sonic’s neck roughly, taking a step back and turning his head away without another word.

 

Sonic immediately coughed, turning on his side and curling in on himself for a second as he caught his breath, clutching his ribs where they’d slammed into the pavement earlier.

 

Shadow’s eyes flicked to the side, eyeing Sonic down on the ground. “Tch. Pathetic.”

 

Sonic shot up, anger replacing fear. He swung hard, landing a clean hit on Shadow’s jaw.

 

“You call that giving somebody a chance!?”

 

Shadow growled, shoving Sonic away. “I let you take another breath, and yet you’re not convinced it was a second chance?” Shadow’s voice echoed through thick tension.

 

Sonic gritted his teeth, the realization awakening his rage to life.

 

“You ungrateful buffoon.. When will you learn!”

 

Sonic lost it.

 

Their spindashes collided mid-air with an explosive crash—electricity snapping outward. They landed evenly, skidding across the concrete, sparks fizzling at their feet.

 

Sonic stumbled, clutching his right leg. Shadow noticed. His eyes flicked from Sonic’s face… to the injury.

 

He’s actually hurt. “You idiot…”

 

But it was too late.

 

“Sonic, wait—!”

 

Sonic pounced, knocking him over. He pinned Shadow, rage still boiling in his chest.

 

His fist drew back.

 

“Sonic, stop!” Shadow grabbed his wrist—his voice broke through the haze. “…Your leg. It’s injured, isn’t it?”

 

Sonic blinked, confused. “What?” The realization returned all at once. The pain. The strain. The heat faded from his expression.

 

“Damn it, Sonic,” Shadow muttered. “Stop playing games and get off of me.”

 

He sat up, and Sonic rolled off, collapsing beside him with a sigh. Just as he was about to rest—a hand appeared in front of his face.

 

“…Shadow?” Sonic looked up, stunned.

 

“Do you want help or not?”

 

For a moment, the two stared at each other in silence. Then Sonic reached up, grabbing Shadow’s hand. He was pulled to his feet.

 

“…Thanks.”

 

“Don’t get used to it,” Shadow said, folding his arms.

 

Sonic chuckled. “Ha, wasn’t planning on it.”

 

Shadow glanced at him sideways. “A word of advice—stop poking your nose in places it doesn’t belong unless you’re trying to get yourself killed.”

 

Sonic’s smile faltered, preparing for the inevitable lecture.

 

Shadow sighed. “Go get your knee fixed before you throw yourself into more fights you can’t win.”

 

“Ay ay, captain,” Sonic replied with a mock salute—then immediately winced from the motion.

 

Shadow muttered under his breath. “Idiot…”

 

He watched Sonic limp away, expression unreadable. Something soft flickered across his face. He turned, shoving the thought away and disappearing into the crowd.