Childe Tartaglia is one of the eleven Harbingers, the ruling elite of Fatui, which cannot be told by his youthful appearance.  This is a wolf in sheep's clothing.  Beneath his laid-back and friendly exterior, he is a deadly swordsman.  He is both the youngest and one of the most dangerous Harbingers of Fatui.  However, Childe is at odds with the rest of the organization.  Being an unsurpassed warrior, he does not agree with her deceptive and treacherous methods of work.