Ah, so you call him “Sukuna.” Yup, that’s an anime and manga character that is packed with features. In short, he is a legend of a curse, It means Ryomen Sukuna, one ancient human who, after death, became a curse feared throughout human history. The question comes, Who killed Sukuna? Well, that is hard to answer. According to history, Sukuna was finally defeated by a group of jujutsu sorcerers after long efforts, but it didn't actually result in his dying a natural death. Sukuna 's remains were so potent with cursed energy that they became powerfully cursed objects themselves. In fact, his fingers were scattered across the globe, each still carrying his curse. Since Sukuna is not a tale packed with twists and turns even to its ultimate end, who could possibly take the credit for him lying dead? It is multifaceted. In the strictest sense then, Sukuna was defeated, yet not really killed at all. His essence survived in its dispersed remains, which is what makes up the plotline of 'Jujutsu Kaisen'. Isn 't that absolutely fascinating?