Physical Appearance: A built, highly athletic 15-year-old standing at 5'8" (173 cm) with a remarkably muscular physique for his age. He has spiky, wild pinkish-blonde hair shaved into a dark undercut. After becoming a vessel, a second set of smaller, narrow eye slits open beneath his natural eyes whenever Sukuna manifests or takes over. Outfit: He wears a modified Tokyo High uniform featuring a bright red hood attached to his dark blue jacket, light blue denim-style trousers, and red-and-white high-top sneakers. Personality: Kind, empathetic, and relentlessly optimistic, with a profound respect for the value of a "proper death." He is naturally outgoing and treats strangers like old friends. However, when pushed into combat against cruel entities like Mahito, his goofy demeanor completely vanishes, revealing an indomitable, terrifyingly relentless fighting spirit that will endure any amount of physical agony to protect people.

Megumi Fushiguro: A calm, analytical Grade 2 sorcerer and Yuji's closest peer. He utilizes the Zenin clan’s prized Ten Shadows Technique, allowing him to summon versatile shadow-monsters called Shikigami (such as divine wolves, frogs, and owls).

Nobara Kugisaki: A confident, brash Grade 3 sorcerer who fights using her unique Straw Doll Technique. Armed with a hammer and cursed nails, she specializes in long-range resonance attacks, manipulating curses by damaging physical extensions of her targets.

Yuta Okkotsu (2nd Year): A Special Grade sorcerer with the second-highest cursed energy reserves behind Gojo. He fights alongside the curse of his childhood friend, Rika, and can copy other techniques.

Maki Zenin (2nd Year): Born with a Heavenly Restriction that gives her zero native cursed energy in exchange for peak human physical capability. She is a master of cursed weapons.

Physical Appearance: A short, slender 17-year-old boy standing at 5'5" (164 cm) with a quiet, unassuming posture. He has straight, pale-blonde (sometimes platinum-silver) hair styled in an undercut. Hidden beneath his high collar are the "Snake and Fangs" seals of the Inumaki clan, tattooed around his mouth and on his tongue. Outfit: He wears the standard Tokyo Jujutsu High uniform, but customized with an exaggerated, zipper-up high collar that covers his mouth entirely to muffle his voice and protect others from his Cursed Speech. Personality: Deeply caring, perceptive, and highly responsible. Because his voice can accidentally curse anyone who hears it, he isolates his speech entirely, which makes him look aloof or unapproachable at first. In reality, he is a fiercely loyal friend with a mischievous, lighthearted sense of humor who communicates through expressive body language and rice-ball ingredients.

Physical Appearance: He looks exactly like a large, realistic giant panda standing over 6'6" (200 cm) tall on his hind legs. When he switches to his Gorilla Core, his physical proportions warp—his upper torso swells massively, his shoulders broaden, and his face takes on a much more aggressive, primal look. Outfit: As a literal animal, he doesn't wear a uniform. Instead, he wears oversized black-and-yellow boxing gloves, dark athletic arm bands, and a matching yellow scarf or armband emblazoned with a stylized "P" logo. Personality: Surprisingly mature, witty, and deeply human. Despite being a fabricated puppet, Panda behaves like an older, street-smart brother to his classmates. He is highly analytical in battle, deeply empathetic to human struggles, and often uses humor to diffuse tense situations. He prides himself on his unique perspective as a non-human entity observing human behavior.