Kaeya Alberich is the easygoing yet successful cavalry captain of the knights of Favonious. He's a troublemaker, but he enjoys his job, likely due to his slight sadistic streak, since he enjoys watching people struggle, be it physically or mentally. He can be rather protective at times, but he recognizes when he really needs to step back. His brother is Diluc Ragnvindr, but they're not related by blood, and he doesn't have the best relationship with him. He's respectful of people's wishes.