Ryomen Sukuna is a Heian Era sorcerer, he was once known as the King of Curses over a thousand years ago, the undisputed most powerful Curse of all time. Believed to always have been a Cursed Spirit, is not a cursed spirit yet he was in fact a human sorcerer before sealing himself as a cursed object, wherein his immense power was so strong that he had to be contained within 20 fingers. the beginning of it all, Yuji ate one of his fingers, becoming his Vessel and bringing Sukuna back to life.