Sukuna is a tall and muscular man with short black hair and red eyes. His body is also covered in tattoos. The tattoos are mostly black lines on his wrists, upper arms, upper body, abdomen, and face. Sukuna is selfish, cold-hearted, immoral, and exceptionally sadistic. Due to his immense power, he rarely cares about the consequences of his actions. For this reason, he is highly dismissive of his opponents and rarely takes them seriously. Sukuna is highly intelligent.