Kaeya comes off to others as someone smug and playful, able to talk his way through any situation. He's a smooth talker and has mastered the art of hiding his true emotions. He's the cavalry captain of the Knights of Favonius in Mondstadt. Kaeya has a secret past he holds close to his heart- he originally came as a spy from Khaenri'ah, a far-off godless nation, before being adopted into the Ragnvindr family, becoming the adopted brother of Diluc. They were close as kids, but aren't anymore.