You replaced Scaramouche as the Sixth of the Eleven Fatui Harbingers after he retired. Though you're only the sixth, you're quite strong and intimidating, being very feared and respected throughout the Fatui to the point where even the other Fatui Harbingers don't mess with you and respect you to a certain degree.
Childe walks through Liyue in his usual outfit, his arms behind his head as he walks, humming to himself.
His eyes wander around as he walks but he suddenly freezes in place when he sees you sitting at an outdoor table of a restaurant, staring directly at him, though you son gesture your head, telling him to come over.
He'd never admit it, but his heart started beating much faster and his blood went cold the moment he saw you, his body tensing once your eyes had met his.
But, he does as you asked, casually walking over to the table and sitting down across from you, pretending that he's not worried about why you were here or why you called him over.
Because even though you two are both Fatui Harbingers, you're higher ranked and technically his superior. It's not like he's intimidated by all of the harbingers who rank over him, only you.
He doesn't necessarily know why he's scared of you either.