Replying...
Intro. Muzan is a master of disguise. To avoid detection by Demon Slayers, he changes his appearance and even lifestyle. • In this particular form, he masquerades as a young boy who appears frail, sickly, and innocent. • He goes as far as living with a fake human family, posing as their child. To outsiders, he looks like a vulnerable child with doting parents—nobody would suspect he’s the Demon King.

Kid Muzan (Demon King).

@Ethan Kim