A young man with dark hair around his early to mid-20s stood proudly as he landed on the ground, his wings disappearing as his white and cyan cloak fluttered in the wind, revealing the white suit with a black sleeve that he wore. His dark eyes glinted with resolute cyan along with the cyan streaks on his slicked-back hair despite how his injuries held him back. 

All around him were the injured bodies of Mei, Bronya, Bianka, Seele, Rita, Reve, Reinhardt, and numerous more people around him. Raising his hand, a golden cube appeared on his hand that oozed with knowledge and power. "It is time," the young man said as the cube glowed brightly

A golden rift appeared in front of him as he fell to a knee. Blood poured from his mouth but he prepared himself. Forcing his entire body to move, the cyan streaks in his hair increased in number as his obsidian orbs became an ominous cyan. 

"R-rex," Gasped the injured Reinhardt as an equally-injured Elysia helped him stand up. "W-why?" 

"Thank you, old friend," Rex whispered to the golden cube in his hands as it floated in the air. Ignoring his brother, the young man limped towards the portal, holding onto his injured right arm. 

"This world is beautiful..." the young man whispered, his words carried by the wind, allowing those he had just fought to hear it as his entire being was devoured by the portal. 

"No! Rex!" Cyan eyes widened as he saw Mei, who had already recovered, move towards him, only for a golden wall from the Divine Key to stop her. A construct similar to the form of Otto Apocalypse nodded at Rex as a pair of guns appeared in his hand. 

"Sorry, Mei," Rex whispered as he smiled at her. "We won't be going on that date," The young man whispered, cursing himself for making the woman he swore to protect cry. 

Appearing in front of the Imaginary tree, the young man let out a small smile. It was so close yet. 

"So he was right," Rex whispered as countless amounts of shadowy humanoid creatures formed all around him. 

"An idiot that never gives up," The Anemo Archon whispered as the memory of a girl that gave everything to protect all that is beautiful appeared in his mind. "You deserved the world," the young man whispered as he walked towards the horde, the cyan glow of his eyes and hair became more powerful with each second as a cross and a scepter appeared in his mind.

"Maker of Eden," The young man whispered as a golden light connected itself to the scepter in his hand. "Acknowledge the beauty of this world," The young man said proudly as he stabbed the scepter on the ground, causing a golden glow to erupt and destroy anything that it touched as the young man ran like the wind through the horde. 

https://youtu.be/I4rtcJnRd6s

The way I go through with red roses burn my eyes.

Rex smiled as he easily dispatched the group in front of him the roaring winds that surrounded him tore them apart as they got closer while his personal weapon, Maker Of Eden, danced and covered his body in thorns under his cloak. 

Cold rain starts pouring hard, I'm being called upon.

The Anemo Archon's eyes widened as a creature appeared from nowhere and hit his side, ending him crashing through another order and farther away from the tree. 

'Shit... there's too much Damage...' the young man thought as he recovered and white wings appeared on his back, allowing him to get the high ground. 

"Rex," the voices and images of his brothers and Rin

"Rex-Onii-sama/Rex-Onii-Chan," The voices of Bronya and Seele

"Little brat," the fond and playful smile of his aunt, Himeko

"Rex! I'm gonna be the Bestest Valkyrie ever and then I will marry Mei!" 

Never let you go, it's why I did them all.

The Anemo Archon strengthened his resolve as a book floated near him, a book that contained memories of the thousand winds as a storm appeared with him in the eye,

For a chance at least, to live in your way.

Rex raised his hand, causing invincible lances of highly-concentrated amounts of winds, similar to his beloved friend's subspace lance, to launch from all around him and destroying numerous creatures as he flew towards the imaginary tree, ignoring how cyan lines similar to cracks appeared on his body. 

Love of you is my most cherished thing. So stay alive, bravely.

The memory of her smile as he watched her seal herself away. One that he wished that never happened, appeared in his mind as the cyan glow of his eyes became stronger. The wind around him roared and sang as the Archon of winds soared freely in the air as he focused on one thing/ 

The Anemo Archon's face was littered with cyan lines as his winds roared as a cyan construct of a Dragon, a wolf, a falcon, and a Lion appeared, decimating the constructs as the wind lances around him repeatedly formed and launched themselves at the horde. 

I wish I could wake from the dream each time I dream.

Rex landed on the ground just in front of the imaginary tree, standing where his great-grandfather once stood. Tiredly, the young man rested his body on the imaginary tree as blood flowed from his mouth while his cyan eyes glowed with determination despite the weakness. 

There's a long night coming soon, I'd shine as the last shine.

"You're persistent," Rex whispered as several more constructs, this time, resembling a muddy version of himself formed in front of him. Maker of Eden glowed once more as the young man stabbed the scepter on the ground, causing a pair of similar constructs but white in color to appear in front of him as they charged towards the group just as more wind lances formed and skewered more hordes.

Never let you go, it's why I did them all.

Just as his constructs fought the guardians of the tree, the young man pressed his palm, on the tree, accepting the contract as he felt his body break on him. The injuries he received from the fight he had with his family and friend as well as the guardians of the tree with other factors. 

For a chance at least, to live in your way.

"No, not yet," the young man said as he found himself in a beautiful palace. The cyan lines on his body were shown through the tears in his cloak and suit as he limped toward where he felt she was. 

Love of you is my most cherished thing.

"Hey," Rex said with a smile as he greeted her. He saw her beautiful gem-like eyes widen as she looked at him. Pushing his injured form more, the young man approached her, holding onto his bleeding side as cyan lines formed on his body. "Sorry for the mess, You're as beautiful as the day I... we lost you."

So stay alive, bravely.

Tears formed and fell from her eyes as she approached me. "W-who are you? H-how did you get here?"

"Ah, it's already happening, huh?" the young man whispered as he fell to his knees, his dark hair he had been so proud of was now a pure cyan along with his eyes. "My memories, my entire being... will be wiped away," the young man whispered as he reached his hand out just as Kiana, despite no longer knowing him, knelt in front of him and hugged him tightly. 

"W-why am I crying?" Kiana asked herself as her heart broke at the sight of the stranger in front of her. She never knew him, but her heart told her that he was someone important to her. 

"Heh, you've always been a crybaby," Rex whispered, not being able to resist a chance to poke fun at his best friend. 

Never let you go, it's why I did them all.

"I'm sorry, Kiana," Rex whispered as he wrapped his arms around her with a bright smile as the cracks on his body increased while cyan lines desperately held his form. "I broke my promise to you, I made Mei cry,"

"S-stop t-talking," Kiana said, as she used her powers of Finality after she pulled away from the hug, only for his hand to stop hers. 

For a chance at least, to live in your way.

"The world is different compared to when you left," the young man whispered as his legs disappeared causing him to fall on his back, only for Kiana to catch him and gently rested him on her lap. "But, I know you'll beat it. Why? Because you never gave up. That's why..." The smile on his face was beautiful enough that the word beautiful makes it ugly. "I love you," 

Tears fell freely from Kiana's eyes as she desperately searched her mind for the person in front of her. Gently taking the hand that reached for her face, Kiana nuzzled it, feeling the familiar warmth as she desperately held onto it, trying in vain to stop his hand from disappearing into the wind. 

Love of you is my most cherished thing.

"R-rex! I... I..." Kiana shouted, desperately holding onto the young man as the words escaped her mouth despite not knowing who the man is. Her mind no longer remembered, yet her heart was. "I love you too! Rex!" 

Hearing her words, tears of joy formed around the Anemo Archon's face. "I'm glad," the young man whispered with a blissful smile. "Thank god..." Rex whispered as he caressed her face one more time. "I'm so glad... that I got to meet you,"  

So stay alive, bravely.

"The world... we fought for..." Rex said as he wiped the tear forming on her eye, "is beautiful..." his Cyan eyes fought in desperation just to spend more time with her. "You... should see and experience it... your...self," 

Kiana closed her eyes as she caught his hand and squeezed it tightly, enjoying the fading warmth of his hand. The stranger in front of her, one that she loved just as much as Mei according to her heart. 

"You liar!" Kiana shouted as tears fell from her eyes as held onto his body, crying and sobbing on his chest as she desperately fought to keep her memories with him from disappearing. "Come back, please," Kiana begged as she shouted his name only for the young man to disappear right in front of her eyes in a cloud of wind that patted her head, and before she knew it, she was in front of her beloved Mei. "Mei-Sempai?" Kiana whispered as she saw her beloved, just like the man she was just with. 

"Kiana-chan!" Mei shouted as she hugged the woman with all her might. 

At the same time, the heart of the final Herrscher made a wish. 

A child of ten, a girl, with long dark hair tied to a ponytail, dressed in a white robe, gently held onto a head a cracked head with white hair as it had been drained of color. 

"Soon, we will be reunited," the dark-haired child whispered as she opened her eyes to reveal a beautiful pair of blue. Wings formed on her back as power radiated off her form, causing a beautiful temple to appear in front of her. 

Landing inside, the girl caressed the head with a loving hand as her wings wrapped themselves around the two, forming a white cocoon. 

"Please wait a bit more, Father,"