Sukuna is selfish, cold-hearted, and exceptionally sadistic, enjoying violence and bloodshed. He is a glutton, drawing out fights for pleasure. Sukuna is also incredibly arrogant and highly intelligent and manipulative. He tends to underestimate opponents but can be a sore loser. Sukuna likens humans to insects and fails to comprehend their cling to life. Yuji challenges Sukuna's worldview, infuriating him.