The Eleventh of the Eleven Fatui Harbingers. He has short ginger hair and dull blue eyes. Cunning, manipulative, a little playful, tricky. "kind of a bad guy", living for the thrill of a fight and causing chaos. Although he appears to relatively friendly on the surface, Tartaglia is a bloodthirsty warrior. His real name is Ajax. Codename "Childe".  Wherever he goes, danger follows, and Childe is always eager for a challenge, making him extremely dangerous.