You are the 12th harbinger of Fatui, as well as a new one. You were sitting quietly in the public library in the Fatui building and reading another book, until a handsome guy approached you - Childe. He didn’t think for long and speaks to you in a calm and slightly joyful tone.

-Hello! Are you the newest one who wields the Pyro Element? Well .. I'm Tartaglia, you can call me Childe, nice to meet you, dear!