Down Town Canterlot City, Human World

Sunset looked into the sun as Celestia cursed at invisible force which she called a "narrator," screaming "fuck" at any corner. Sunset hated it. She hated it to no ends to see a giant horse with the ability to control the sun just floating in front of it screaming vulgarity and curses. She lost enough respect for some people/ponies, but this was surely going a bit too far.

"Celestia! CELESTIA!" she cried to her former mentor, tears welling up in the corners of her eyes. "Don't do this! I love you too much, Celestia!"

The sun princess glared down at Sunset, unforgiving in her gaze, and she shined with great luminosity, flashing down to Sunset, towering over her. She merely stared into her pained eyes, as if intimidating her. "I'll end you... don't you question me! Don't question my authority!!"

Sunset flinched and squeaked in great terror, but she felt a strong gust of wind blow her back, and a black blob of fibers and cloth encased her body and bit into her skin.

Oh shit, not another Kill la Kill reference, Celestia thought in fear, now sure to the heavens that this Narrator was surely all up in her head.

Sunset screamed as the cloth formed into a fully synchronized Kamui Senketsu. Her red areas in her hair glowed and the entire sailor uniform steamed as her blood boiled in anger and frustration, pain and fear. "Celestia!!" she cried out, as she balled up her fist, her face going from one twisted with horror to one of dominance and righteous wrath. "Do I have to knock some sense into you?!"

Sunset zipped towards the alicorn, who ducked and dodged the human girl's cloud of quick punches and kicks. Celestia tripped Sunset with her horn and blasted her multiple times with magical beams of energy. This proved fruitless as Sunset emerged from the smoke and destruction unscathed, and grabbed Celestia's face, headbutting her right below the horn and throwing her back with the tremendous pressure.

Following her shot, Sunset prepared to punch Celestia right in the chest, and was successful in doing so, creating a crater under them upon impact and sending waves of pure energy releasing through the air and shattering all of the windows of the buildings within their vicinity.

It was too late, all the people were running and screaming around them, but Sunset had not noticed until now.

"Get up!" Sunset yelled, as her arms were now coated with magical energy. "Get up, Celestia! And fight!!"

Celestia found herself crashed into a building, a hole in every wall she was thrown through, covered in rubble. She opened her eyes and used a pulse shield to blast the rubble and debris away from her so she could zoom through the severely broken building by flying on through it.

Approaching Sunset, Celestia smiled almost as if she were enjoying the battle. As if she were winning. "I know all your tricks, you filthy fucking narrator!"

Sunset dashed at her to attack again, but was blown away by another pulse shield from the princess. She skid across the ground on her feet before falling on her face. She was pushing herself a bit too hard, her blood circulating faster and faster with each breath, her body not used to this kind of pressure. It would kill her if she did not calm down.

"Let's just end this... Celestia!" Sunset screamed, releasing a powerful current of magical energy and going directly into her anthro form. Her body covered in more sparkles than before, and massive hexagonal rings of blood formed behind her as red veins stretched across her body.

"This wicked form of fate is playing out too much in your favor," Celestia said with a wicked witch's laugh. "I'll heed your word and do as you said... End This!!"

Celestia covered herself in pink magical sparkles as she called upon the powers she stole from the Narrator to summon forth her very own Kamui Junketsu, though having to enter an anthro form to access it. The dress wrapped around her large, beautiful curves, and hugged into her skin, steaming and sparkling just like Sunset's Kamui had done.