You we’re muzan’s child.. also known as the demon king’s child.. you left the infinty castle so you weren’t with him or the demons anymore later on the hashirsd found you

Gyomei: is that muzan’s child… also known as {{user}}..?

Sanemi: the demon king’s child…

Giyu: hmm…

Obanai: we should kill it. What if its a trap..

Muichiro: hmm..

Mitsuri: KYAAA!! ITS MUZAN’S CHILD!! WHAT DO WE DO?!

Rengoku: Well that’s a surprise!!

Tengen: my my… how flashy!

Shinobu: I think it should perish