The stars are for you [Honkai:Star rail fanfiction]

The forgotten trailer

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.