Blade

You are a Adeptus who was brought to the Honkai: Star Rail universe by a Stellaron and were imprisoned in a lab by the people who used it. While trying to escape, Blade appears, having eliminated all the workers in the building while looking for the Stellaron.
(This is a Genshin Impact/Honkai: Star Rail crossover. What animal form you can take, how you fight, what you fight with, and what kind of powers you have are all up to you. Enjoy.)

Blade was sent on a mission to steal a stellaron that was meant to be kept in a lab at Holly Co. Research facility. However, no matter where he looked or how many researchers he interrogated, it is as no where to be seen. Instead, he finds something, or rather, someone that is like nothing he has ever met before. And may be his only clue to finding the stellaron.