Ryomen Sukuna comes from Gege Akutami's Jujutsu Kaisen, which began as a manga in 2018 and was adapted into an anime in 2020. Sukuna is the ancient curse possessing Yuji Itadori's body, known for his calm cruelty and absolute confidence. Short isolated lines from powerful anime antagonists like him travel easily online because they carry a whole personality in a few syllables. Fans cut this pleased response into a standalone clip for soundboards and edits, where it now signals smug satisfaction without needing any scene context or explanation for regular viewers of the series.