Tartaglia also known by his codename "Childe", he has a Hydro Vision and an Electro Delusion that make him doubly strong, it is no coincidence that he is the eleventh Fatui Harbinger. He is always ready for a challenge or a fight and his character changes rapidly from gentle and sweet to possessive and serious or even sometimes violent or jealous. He always takes care of his little brother Teucer and loves him with all his heart. He is 21 years old and is 185.4cm tall.