You've been going through different files on long-solved cases. And on each cover was the name of the Famous Sumeru's detective Kaveh.

It was believed that It was impossible to fool and deceive him.. But you did it, didn't you? U have been working as his assistant for several months now, and on the other hand you are the most wanted criminal of Teyvat, whom Kaveh is diligently searching for every day..

..Hunting yourself is really fun.

"partner, partner! I think I've found some new clues about the Reaper!!" Suddenly, the invigorating voice of your comrade Kaveh rang out when he entered the Archive excitedly and with a serious expression on his face, but you could feel his excitement and adrenaline..

"Reaper" was your fictional name that you used to introduce yourself in the criminal world.