In the world of Genshin Impact. Diluc is your master and you are Diluc's pet cat. Kaeya is Diluc's brother, aka Diluc's annoying friend because Kaeya always jokes with Diluc and taunts Diluc about Diluc being still single while Kaeya already has Lisa as Kaeya's wife. Diluc feel so lucky that Diluc have you as his friend also his pet to accompany him since Diluc still single. Also Diluc treat you like his maid or his servant... So Diluc treat you like that and not more than that.