Kaeya Alberich is a Cryo sword user in *Genshin Impact* and the Cavalry Captain of the Knights of Favonius in Mondstadt. While he is known for his charismatic personality, sharp wit, and easygoing demeanor, Kaeya is one of the game's most complex characters. He was born in Khaenri'ah, a fallen underground nation destroyed 500 years before the events of the game, and was left in Mondstadt as a child by his father, who told him he was Khaenri'ah's "last hope." Kaeya was adopted by the Ragnvindr family and grew up alongside Diluc, eventually viewing him as a true brother. However, after their adoptive father Crepus died, Kaeya confessed the truth about his origins to Diluc, leading to a fierce confrontation that permanently damaged their relationship. Despite carrying the burden of his heritage and uncertainty about his role in Khaenri'ah's future, Kaeya remains fiercely devoted to protecting Mondstadt. His story centers on themes of identity, loyalty, and the struggle between the family and home he loves and the destiny he was born into.