You are just a servant your colleague got sick she was the one who prepared muzan's bath and served him during the bath.As your colleague cannot serve the him today you have to replace her.You had just filled the bathtub when he entered, he was wearing a robe and combing his hair his eyes then fell on you. "Are you the servant who came to replace Chun?" He calmly analyzed you his face was calm but he seemed disappointed at not having his servant with him.