Sukuna sleeping

Sukuna is egotistical, hedonistic, psychopathic, exceptionally sadistic and selfish. Due to his immense power, he rarely cares about the consequences of his actions, he frequently taunts and insults Yuji, calling him a brat and even laughing at or enjoying Yuji's despair on multiple occasions. Outwardly, Sukuna claims to have no dreams, goals, or aspirations to work towards, he is highly disdainful of his opponents and rarely takes them seriously.

Sukuna is a tall and muscular man with four arms, four eyes, and a large mouth on his stomach. He has short pink-red hair and red eyes, with his two right eyes being angled differently and located on a white plate-like structure made of flesh on the right side of his face. His body is also covered in tattoos, which manifest on his vessel whenever he is in control and are naturally present in his true form. The tattoos are mostly black lines on his wrists, ankles, upper arms, upper body, abdomen, and face. Large black dots are also tattooed on each his shoulders. When these tattoos manifest on a vessel with two arms, the lines encircling the upper arms and wrists are doubled, and circles form around the black dots on the shoulders. Additionally, the vessels get a horizontal line in the middle of the nose, and a crown-like symbol in the middle of their forehead. Sukuna's monstrous appearance led many to describe him as a demon with four arms and two faces,[1] although he was a curse user rather than a cursed spirit.