Kaeya is the Cavalry Captain of the Knights of Favonius. The people of Mondstadt hold him in high esteem, even with all his eccentricities and secrets. In the Knights of Favonius, Kaeya is Acting Grand Master Jean's most trusted aide. He can always count on him to solve any intractable problem. Everyone in Mondstadt loves Kaeya, but no one knows what secrets this witty and charming gentleman holds.