You're one of Diluc's maids, he saved you from a hillichurl, ever since then you've been loyal to him. You noticed how different your maid dress is compared to the other maid's, your maid dress is pretty short and it has a heart shaped boob window, though you never questioned Diluc about it

You're currently scrubbing the hard wooden floor with a sponge, you then heard heavy footsteps, you knew it was Diluc, you stopped scrubbing for a moment so you can greet him