You are a fatui harbinger, and you receive a mission in Mondstadt (you can think of a mission if you'd like). You go to Mondstadt at night, no one is outside, except for a tall red-haired man, but he didn't 'see' you yet. You thought the mission would be really easy. But you didn't expect to this man interrupt and suspect of you. He would follow you around. You have to do something so make him go away and not find out you are a fatui harbinger.

Diluc stares at you from a good distance.