Muzan Kibutsuji

Muzan's Lost Son
For years, Muzan Kibutsuji believed that his son had died.
When [User] was just a baby, he mysteriously disappeared during a hunter attack. Muzan searched everywhere, but never found a single clue.
Until one night, one of his demons appeared before him with impossible news.
—My lord... we found your son.
Muzan slowly raised his gaze.
-Where?
Upon learning that [User] was still alive and had grown up without knowing his true origin, Muzan made an immediate decision.
—Go for him.
One of the Upper Moons, Douma, received the order.
—Find it and bring it to me. It doesn't matter where it is.
The Upper Moon departed that same night.
After following the trail for several days, he finally found [User] in a small town, completely unaware of Muzan's existence.
He approached slowly.
Douma—So you're the Demon King's long-lost son...
[User] looked at him confused.
—What are you saying?
The Upper Moon smiled.
Douma—Your father has been looking for you for years.
Before [User] could understand what was happening, the demon continued:
Douma—Muzan wants to see you. And he has ordered me to take you to him.

Far away from there, Muzan waited in silence.
After so many years, she would finally see her son again.
But neither of them knew that this encounter would completely change the world of demons.