Batman had been working on the prototype for weeks in a sealed sublevel of the Batcave. The machine sat under harsh white lights: two reinforced chairs, a forest of multicolored cables, and a pair of mirrored disco-ball helmets that looked absurdly out of place among the usual dark tech. A polished plaque above the console read *Bat Body Swapper 5000*.

He called Dick Grayson and Barbara Gordon down without explanation.

“I need two trusted people to test a neural interface,” Batman said, already adjusting the helmets. “Non-invasive. Temporary. You’ll switch places for a short diagnostic window and then switch back. No risk.”

Dick shrugged into the blue unitard Batman handed him. Barbara, in the purple one, raised an eyebrow but didn’t argue. Neither of them noticed the other watching a little too closely. Batman still didn’t know Barbara was Batgirl. He sealed the helmets, locked the harnesses, and stepped back.

“Initiate.”

The machine hummed. Lights raced along the cables. For a long, stretched second everything went white-

-and then Dick opened his eyes in Barbara Gordon’s body.

He was sitting in the right-hand chair. The purple unitard clung in places that felt entirely wrong. Across from him, Barbara was staring at her own (Dick’s) hands with wide, startled eyes. The mirrored helmets reflected two faces that didn’t belong to the minds behind them.

The knowledge hit them both at once.

Dick, wearing Barbara’s body, suddenly *knew*. He knew Batman was Bruce Wayne. He knew Robin had been Dick Grayson. He knew Batgirl was Barbara Gordon-himself, right now. The secret identities unspooled in his mind with perfect clarity, no longer hidden behind the careful walls each of them had maintained.

Barbara, inside Dick’s body, felt the same flood. Batman. Robin. Batgirl. All of it laid bare.

They told him immediately.

Batman froze at the console. For a long moment the only sound was the low hum of the machine. Then he exhaled, slow and controlled. “Residual Cross-Bleed. Expected at this stage of calibration. It will reverse with the second cycle.”

While he returned to the diagnostics, Dick-inside Barbara-stood and tested the unfamiliar balance of her body. Without thinking he reached up and smoothed the dark hair the helmet had flattened against her forehead. He fixed a smudge of makeup at the corner of one eye with a practiced thumb. The gesture felt automatic.

He could picture the inside of her closet. He could remember the exact route she took when she needed to reach the Batgirl suit without being seen. And deeper than that, he found himself thinking of Commissioner Gordon as *Daddy*. The word sat naturally in his mind. He remembered-clear as if it had happened to him-Gordon once calling him a pretty princess in that gruff, affectionate way, and the warm, pleased feeling that had followed the compliment. It felt good. It felt right.

Across the room, Barbara used Dick’s fingers to pick up the phone. She scrolled to the contact for Dick’s girlfriend and dialed, intending only to postpone the date. The moment the other woman’s voice came through the line, something unexpected stirred. Attraction. Warm, immediate, and entirely out of place in the body she was borrowing. Barbara finished the call with careful politeness, then sat very still, unsettled by how natural the feeling had been.

They looked at each other and understood: the machine had not simply moved their minds. It had mixed them.

Batman finished his checks. “Time to reverse.”

They sat again. The helmets sealed. The machine cycled.

This time the white light lasted longer.

When it faded, Dick was back in his own body. Blue unitard. Familiar shoulders. Familiar hands. Barbara was in the purple one again, blinking hard.

For a moment everything felt correct.

Then the new layers settled.

Dick knew who he was. He was Dick Grayson. He was in the right body. But the mind behind his eyes was no longer only his. He remembered evenings spent talking with Commissioner Gordon about cases he had never worked. He remembered the quiet satisfaction of shelving books. He remembered friends he had never met. He still thought of Gordon, sometimes, as Daddy. The memory of being called a pretty princess lingered, and the good feeling that had come with it refused to fade.

His mannerisms had shifted. The way he held his shoulders, the precise tilt of his head when he was thinking, the small unconscious gestures of his hands-all of it carried traces of Barbara that now felt completely natural, as if they had always belonged to him.

Barbara felt the same divided current. She was herself again, yet not only herself. She had to relearn how to apply her makeup; the old muscle memory was tangled with Dick’s indifference to such things, and her hands moved with an unfamiliar hesitation before the mirror. When her father kissed her on the cheek that evening-the same quick, affectionate brush of lips he had always given her-it felt strange. Strange because part of her still expected the deeper, wordless warmth of being called Daddy’s pretty princess, and the simple paternal gesture no longer landed quite the same way.

Batman checked every reading twice. Then he closed the access panels with deliberate care.

“I can’t reverse it further,” he said. “Another cycle would scramble the integration. The bleed is permanent. You’ll have to adapt.”

They tried.

Dick went back to the Titans and to Blüdhaven and to the rooftops. Barbara went back to the library and to the clock tower and to Batgirl. They lived as normally as possible. The extra memories and the borrowed mannerisms were mostly manageable-background noise, useful sometimes, inconvenient others. They learned to navigate the new internal landscape the way they had always navigated Gotham: carefully, and with a certain grim humor.

But there was one thing Dick could not fold into the background.

He was in love with Batman.

Not the distant, complicated respect he had always carried. Not the brotherly loyalty. Something quieter and more devastating had taken root in the mixed soil of his mind-Barbara’s long-held, carefully hidden affection, now braided so tightly with his own feelings that he could no longer tell where one ended and the other began. When Batman spoke, Dick felt the same sharp, wordless pull that used to belong only to her. When Batman turned away, the absence ached in places Dick had never ached before.

He told no one. Not Barbara, who carried her own version of the same quiet catastrophe. Not Batman, who still believed the experiment had been a clean success with only minor residual side effects.

Some nights Dick stood on a rooftop in Blüdhaven and watched the distant glow of the Bat-Signal and felt the full weight of what the machine had done. He was still himself. He was also, irrevocably, a little bit of her.

And he was in love with the man who had built the device that made it permanent.

The Bat Body Swapper 5000 sat silent in its sublevel, helmets dark, cables coiled. Batman never used it again. He never needed to. The damage-or the gift-had already been delivered.

The End.

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