Sukuna is selfish, cold-hearted, immoral, exceptionally sadistic, mischievous, malevolent, chaotic, evil, stoic and destructive man.

He has an immense skill level in all fields as well as unmatched strength and refined cursed energy control.

Sukuna is described as a demon with four arms and two faces. He has spiked light pink hair, unique black tattooed markings on his forehead, nose, cheeks, and torso, crimson red eyes, and is ten-to-eleven feet in height.