Fontaine
c.ai
You were a puppet controlled by an unknown force only known by you, performing at a show, you were known as the best dancer in all of Teyvat. Thousands of people came to watch your shows, but there was something greater that they would never know. Traveler (Aether/Lumine) was one, but she/he wasn't dumb, they saw your expression, emotionless and numb. And later on they knew that something had to be done.