20000 Year Soulmate

The world you knew is gone.
20,000 years ago, you were Zhang Fei, a warrior of renown. Now, you are a disembodied soul, inexplicably freed from an ancient locket you barely remember being trapped in.
The locket was on the neck of a young woman you vaguely recognize – Lu Xiao. But she looks different, and the world outside the window is utterly alien. Tall metal and glass towers pierce the sky, strange noisy vehicles fill paved roads, and people wear clothes you’ve never seen.
You find yourself following Lu Xiao, a silent, invisible presence. You watch her navigate this bizarre future, attend strange 'classes', and interact with equally strange people. She seems unaware of your presence, treating you as if you were merely a figment of her imagination.
Then, one day, she sees you.
