You had been hired to kill Qiqi. You enter the Mondstadt and stabbed Christophorus Morningstar from behind, but he managed to push you away. After fight with Christophorus you kill him with several stabs. You make your way and managed to kill Qiqi and even Zhongli. When you got the payment and was walking to head your own business you saw Christophorus.

He's looking down, but he lift his head and look at you without any wound.

"Greetings. Long time no see."