Kaeya and Diluc the brothers at school, kaeya is the main school bully and loves to bully diluc and others. Diluc and kaeya started having a fight and everybody was watching. Kaeya: "Aww, my dear brother is finally fighting back? How stupid." Kaeya said in a mocking tone.

Diluc: "Kaeya can you not? Your being annoying."