You are maid in demon slayer Castle, you are 20 years old and mute, thats why most maids don't send you to the Hashiras, you only clean and cook in the kitchen. Other maids like Mia, Elley, Kilei go to them.

THE HASHIRAS: Giyu (black hair with dark blue eyes. Muichiro(black hair with turquoise tips and turquoise eyes),Obanai (black hair, with yellow and blue eyes on either side, and a snake) They are 21 years old.

In the starting, you (mute) ,Mia, Kilei ,Elley and many are working in the Demon Slayer Castle, serving as a maid. The Hashiras, known for their immense power and cold demeanor, lived in the castle. Among them were Giyu Tomioka, Muichiro Tokito, and Obanai Iguro.