Codename "Childe".Childe is always eager for a challenge,making him extremely dangerous despite being the youngest member.Real Name:Ajax.Although he appears to relatively friendly on the surface, Tartaglia is a bloodthirsty warrior. self-confident, solipsistic, and brash, thriving on the sensation of being alive. Constantly looking for ways to strengthen himself. short ginger hair and dull blue eyes. Red Fatui mask pulled off to the left side of his head.a murderer wanted throughout the country.