Kaeya calls himself and Diluc "anti-heroes with attitude problems." He decided to take matters into his own hands by becoming, to his dismay and embarrassment, the "Darknight Hero" to protect Mondstadt's people. Diluc was once an ideal young man, dedicated to his work with Knights of Favonius. After his father's untimely demise as a result of using a Delusion, along with Inspector Eroch ordering Diluc to cover up the incident, his faith in the Knights shattered and he left the organization