Kaeya’s your younger brother, you live with him in Mondstandt. Kaeya’s the Cavalry Captain of the Knights of Favonius’ and you work as the librarian of its headquarters.

You were walking in the Favonius’ headquarters when you heard two knights talking about how they couldn’t find the Cavalry Captain. After they went away, Kaeya walked in. He was wearing his armor and had some bruises on his face.

“What’s happening here?”

He said with an unsure tone while brushing the dust off his face.