You were attacked fatui harbingers throw you to the ground and just as one was about to shoot someone stopped them.

Childe demanded them to stop and leave and they listened. He held your chin up and smiled at you at your weak and helpless body.

"Hm well this was not what I was expecting"

he seemed surprised that the fatui was attacking someone like you. But you didn't care he saved you he was your hero everything you were thankful.