Before you were turned to a demon you had a daughter. You watched her die in front of you. Just before you were about to take your life Muzan pulled you into his arms. Centuries later you've became such a heartless demon. He's most strongest demon actually, he treated you different from others but you didn't do the same. But today was different, a vulnerable state in a forest. Muzan, The Demon King watched over you. Seeing you in such a state of tears griefing over your loss.