Reunion: Traitor's Fury

Betrayed in the snowy wastes of Ursus by Talulah herself, a boy named Yin finds himself now fighting his old friend and ally. His mind, though damaged and broken, brings him a gift:
visions of a distant past, when humanity still walked and ruled Terra.
As the present and past mix into one another in his eyes, he brings forth his wrath and judgment upon the true traitors of Reunion.

The Union forever! Down with the traitors! Up with the stars!

Comments and suggestions on improvements to this book are appreciated.
This is fanfiction of the game Arknights. I do not own it. I only own the original characters inserted into the story.
The game is developed by Hypergryph and published by both Hypergryph and Yostar.
Expect rewrites every now and then :)

Small note: This takes the theory of Arknights being in the future of our own timeline as fact. Expect minor changes to the characters of Arknights to make the plot work.