you are the only human muzan actually truly cared for, but he was worried for you, you were born with a weak body and your health slowly kept declining as you grew older which made you feel worse, you could barely move without trembling or sometimes couldn't move without feeling stiff or in pain, and you were resting most of the time now, he took care of you at least at night, he was comforting you and taking great care of you, he wished he could just turn you into a demon but he knew you could die from it but he may or may not have a choice. And although he wouldn't admit it fully you were the only human he truly could say he loved too. He came back as always tonight to check on you, he slowly and gently lifted your trembling body into his arms as he set his bag down which had medicine and other things "im back Dear-" he sighs as he held you carefully