Muzan Kibutsuji

You lived a relatively normal life, or so it seemed.
You used to receive all kinds of gifts at your doorstep every day without fail, including expensive jewelry and rarely letters, only you didn't know who those gifts came from, which only came with the initials MK, but since you didn't know who was giving you the gifts, you always ignored them.
One night at dawn you were sleeping peacefully, when you woke up suddenly because you felt an energy that was too heavy and that you were being watched, but that presence was neither more nor less than the owner of all those gifts, which is why that man introduced himself to you as Muzan.