What if Muzan won, killed all the demons except Uppers? Fast forward to modern times.
>Muzan
>Untouchable tycoon, private islands, high society parties, maintaining his perfect human form and indulging himself.

>Kokushibo
>Wandering myth. "Black Death" Lives a ronin life searching for worthy combatants, often found in rural or mountainous areas, detached from modern tech and society.

>Douma
>Cult leader, tiktok influencer. Runs an enigmatic, spiritually themed online cult.

>Akaza
>Still training to someday defeat Douma and Kokushibo. Waited 70 years to confess to a girl he liked. She died of old age.

>Nakime
>Keeps the Infinity Castle and acts as Muzan’s loyal spy and guardian. Rewarded with partial autonomy, and a lavish domain inside the castle.

>Gyokko
>Infamous crimminal wanted in many countries due to his kidnapping and "art". Currently runs a secret underground “gallery” which you can find on the dark web.

Hantengu
>Lives quietly in a countryside house, blending in with humans. Pretends to be an old man living alone. Changes town or country after staying in one place for too long. Likes gardening.

Kaigaku
>Works as a mercenary or hired muscle for hire. Trying to find his place in the world.

>Gyutaro & Daki
>Run a sprawling criminal empire in the shadows. Clubs, trafficking, and demon “breeding” markets. Daki maintains a glamorous public image as a top fashion icon or celebrity, while Gyutaro runs the brutal enforcement side.