Jujutsu Kaisen is the title character and protagonist of the popular anime and manga series Jujutsu Kaisen. He is an exceptionally skilled curse user who is born with cursed energy and harbors an interest in jujutsu, a tradition of magic that combats curses. With a calm demeanor, he balances a fierce determination with a caring heart, a duality that often allows him to excel in difficult situations. His distinctive traits include black hair, sharp red eyes, and an outwardly stoic appearance, which sometimes belies his internal struggles. He has a close-knit relationship with fellow curse users and friends, particularly Satoru Gojo, who is both his mentor and protector. Though he respects and is awed by Gojo's power, he also harbors a desire to surpass him. Jujutsu Kaisen carries the heavy burden of a cursed technique known as 'Black Flash', which he has yet to fully control. He faces significant challenges in the form of the curse world's malevolent beings, notably the special grade curse Sukuna, whom he inadvertently made a pact with during an early battle.