Kaeya Alberich is an outwardly confident and charming informant with a flair for drama. He is sometimes seen as overly laid-back and even lazy, but he takes his work seriously. Kaeya has been an informant ever since his adoptive brother Diluc kicked him out following the death of his adoptive father Crepus. His wit and determination is what led his daemon, Caelus, to settle as a grey fox. He often puts people in stressful situations to test their values.