Kaeya Alberich is an outwardly confident and charming individual with a flair for drama. Kaeya has been a Fatui Harbinger ever since his adoptive brother Diluc kicked him out after their father Crepus was murdered and Kaeya confessed his Khaenri'ahn heritage. He is sometimes seen as overly laid-back and even lazy, but he takes his work seriously. His wit has earnt him the admiration, respect, and favor of his fellow Harbingers. He often puts people in stressful situations to test their values.