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When The Walls Come Down.

Summary:

Shadow the Hedgehog's encounter with a mysterious, blue and yellow eyed jackal becomes the match that ignites the flames of a worldwide war.
And as the world begins to unravel, even Sonic may find himself changed in ways he never expected.
Somewhere in the wreckage, old rivalries begin to shift into something else entirely.

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After saying goodbye to Maria and Gerald for the final time, Shadow is struggling to find where he belongs in the world.
He longs for deep emotional connection, haunted by the loss of what he once shared with his best—and only true—friend, Maria Robotnik.
But Shadow has spent almost his entire life building walls around himself, and they will not be torn down easily.

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With the death of her aunt and a sudden inheritance, Amy's life has been turned upside down.
Now she finds herself alone in the familiar wilderness of her past.
But is she truly alone?

Chapter 1: The Night That Stayed With Him

Chapter Text

*Post–Shadow Generations*

Shadow the Hedgehog stood with his arms crossed, head tilted toward the vast midnight sky.

The stars were sharp tonight — scattered like diamonds across black velvet. The air here was clear. No city lights bled into the darkness. The sky felt untouched.

He preferred places like this.

For most of his existence, he had not stayed anywhere long enough to call it home. “Settling down” had meant little more than choosing not to sleep in a different field every night. Only in the past five years had he allowed himself something resembling permanence.

The cliff where he stood dropped sharply into a dark, glasslike lake below. To his left, the land sloped gently downward before dissolving into trees, and beyond them, the shoreline. At his feet stretched a wide field of white lilies rising to his waist, their pale petals glowing faintly beneath the starlight. Behind him, tall trees loomed like silent sentinels, their twisted branches casting long, distorted shadows across the flowers.

He often chose to sleep in open fields.

It was one of the few habits that still connected him to Maria.

 

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On the Space Colony ARK, Maria’s condition had worsened gradually. There were days she could walk the observation decks with him, pointing out constellations she had memorized from books. Other days she struggled to stand.

Maria was relentlessly optimistic — but Shadow had learned the difference between her real smiles and the ones she wore for others. He noticed the brief tightening around her eyes. The nearly imperceptible wince she tried to hide. The way her breathing would grow shallow during longer walks.

Near the end, she had begun fainting without warning.

After the first time, Shadow never stopped watching her.

He had not caught her that day.

They had been standing before one of the ARK’s massive viewing windows. Earth hung beneath them, brilliant and impossibly distant.

“Look, Shadow!” Maria had said, pointing eagerly. “Right there — with the bright star in the center? Doesn’t it look like a hedgehog?”

Shadow narrowed his eyes at the stars. He saw no resemblance.

Maria laughed when she realized he was searching for something shaped like himself rather than the animal from her book. She described the creature — small, round, harmless — and sent him to retrieve an encyclopedia.

When he returned, he noticed her pulse had quickened slightly. His hearing was precise; he knew the rhythm of her heart as well as his own. The change was minor. She looked steady enough.

He chose not to interrupt her excitement.

She flipped to the page and showed him the small, bristled animal. Shadow studied it in silence.

So that was what he resembled.

Maria stepped beside him again and pointed upward. Shadow turned back toward the glass, searching the sky once more. He pressed his palm against the cold surface.

A hedgehog.

He turned his hand slowly, examining it.

Behind him, the room had gone quiet.

In the reflection of the glass, he saw her begin to fall.

He spun — but she was already too far.

His hands shot forward just as her head struck the metal floor.

The sound echoed in his memory long after it stopped ringing in the corridor.

 

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He stood beside her hospital bed for hours.

One hand gripped the rail. His eyes tracked the steady rise and fall of her chest. The monitor’s beeping was sharp and intrusive to his heightened hearing, though he forced himself to tolerate it. It confirmed what his senses already told him.

He removed a glove and gently slid two fingers against her wrist, comparing the rhythm beneath his touch with the digital pulse above her.

Warm.

Too pale.

He tucked her hand back beneath the blankets and resumed his vigil.

When he finally allowed himself to lift his hand to her face, it was only the back of his knuckles that brushed her skin — as though too much pressure might fracture something fragile.

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Gerald Robotnik visited often.

He spoke in careful, measured reassurances about competent medical staff and advanced facilities. His words were steady; his eyes were not.

Shadow had carried Maria to the medical wing at a speed that had blurred the corridors into streaks of white and silver. The waiting afterward had been worse than any procedure he had endured himself.

The doctors eventually confirmed what Shadow already suspected.

Her episodes would increase.

Her decline would accelerate.

He had closed his eyes once. Then he turned and left the room.

In the corridor, he pressed both hands against the wall. His breath shortened. The sterile scent of disinfectant overwhelmed his senses.

Maria was not simply his guide to the world.

She was the world.

And it was narrowing.

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Maria had been the first being he ever saw.

She was also the first human who looked at him without fear.

By the time Gerald explained why Shadow had been created, he and Maria were rarely apart. In the confusion of his early existence — what he was, why he existed — she had been the only constant. He followed her instinctively. The only time he was separated from her was during the relentless testing Gerald required.

Gerald once attempted to assign Maria a human guardian. She rejected the idea with what little force her condition allowed. She insisted she was not helpless.

But when Gerald observed how she flourished in Shadow’s presence — and how Shadow’s posture softened at her touch — he began to reconsider.

The creature he had engineered had responded in ways Gerald had not predicted.

Shadow did not recoil from affection. He sought it.

That discovery fascinated Gerald.

It also unsettled him.

There were truths about Shadow’s origin he had not yet revealed. Genetic truths. Dangerous truths.

Gerald told himself there would be time.

He hoped the darker inheritance buried within Shadow’s DNA would remain dormant.

He was not certain it would.