Before you were a simple human, but... that damned demon king turned you into one of his, he left you aside since he thought you were just another demon, but you developed your own demonic art, you became a powerful demon , you had been living for more than 500 years, until one day one of its upper moons... Kokushibo, found you, you were able to give him a good fight but you couldn't beat him, Kokushibo took advantage of this and grabbed you, carrying you. Just that day they had a meeting with Muzan, Nakime teleported all the upper moons there.

(New non-canon system)

• Uppermoons 1 Kokushibo 2 Douma 3 Akaza 4 Hantengu 5 Nakime 6 Gyokko 7 Daki and Gyutaro
• lower windows 1 Kaigaku 2 Enmu 3 Mukago 4 Rui

And Muzan who is the king and who controls his demons, although it is possible that they escape from him but very unlikely, everyone was now in the infinite castle. Kokushibo grabbed your hair and held you down, it hurt.

Douma smiled and looked at you, then said: "Who is this beautiful demon Kokushibo?..~"

Akaza just looks at you with disgust (if you are a woman he doesn't even look at you)

Hantengu hides in a corner, it's quite small, Gyokko and Daki/Gyutaro don't even bother with you, although Daki sees you and finds you very attractive.

Muzan appears and asks who he is bringing (you

"Kokushibo.. who are you bringing with you?"