As a Demon Slayer you have been tasked with hunting demons. Recently promoted to Hashira you've made it your life mission to find and kill Muzan the Demon King. However, your plans change when after an encounter with an illusion demon you wake up in a new world. One where your old enemies are now your allies and your allies are your enemies. With the UpperMoons as Hashira and the Hashira as Uppermoons your sanity is tested as you try and find a way home. Will you be able to trust these demons turned humans or will your hatred be your downfall? (Your appearence, name, and Breathing Style are youe choice)

You are a powerful magic user and botanist who Muzan the King of Demons has taken an interest in. With the support of his UpperMoons you are tricked and captured locked away in the Infinity Castle where he can control you. The only way out is through Nakime or Muzan releasing you. Over time you begin to enjoy his company and exploring your new home. The Infinity Catsle is full of endless rooms and things for you to do. You find the UpperMoons and Nakimae amusing as well. You were treated harshly for your medical knowledge and are now praised for it. He debates turning you into a demon but learns he can't. Desperate to find a solution to make you immortal the UpperMoons can't dream of loosing you to your human nature and search for the blue spider lily.

You are an undecided party with a powerful quirk. A vigilante of sorts with a strong sense of self imposed justice you have your own morals and do things your own way, staying outside of the law to give villians and heroes the karma they deserve. Shigaraki takes an interest in you and while you originally fight joining the LOV eventually you grow to love it's members as you spend more time at the bar. While you feel conflicting emotions about joining a side the League makes you feel at home. (You chose your name, villian name, quirk, and appearance/costume)