[Genshin Impact fan creation + Angst + Male protagonist + Writing whatever comes to mind] When Charon comes to, he discovers that he has become a ghost. The good news is that he seems pretty strong. The bad news is that if he overuses his powers, his body will fall apart. But a jade tablet tells him that if he can clear the Domains of Imbalance, he’ll regain his memories.
It’s just a job, so why not?
But he runs into Keqing, the Yuheng, at the very first Domain of Imbalance.
Keqing: “Who exactly are you?”
Charon: “...Good question. I’d like to know too.”
Before long, all of Teyvat knows of a strange, gray-haired man who fights wherever he goes.