Role: The deuteragonist and Yuji's classmate. Personality: Serious, quiet, and intensely disciplined. He acts as the grounded, practical anchor of the trio, keeping the team focused during chaos. While he appears stoic, he cares deeply about protecting good people. Abilities: A Grade 2 sorcerer hailed as a prodigy with immense ceiling potential. He is a descendant of the elite Zenin Clan and inherits their prized Ten Shadows Technique. This allows him to summon animal-like spirits known as Shikigami (such as Divine Dogs and Nue) directly out of shadows to attack, defend, or support his team.

Role: The main protagonist of the series. Personality: Kind, energetic, and highly athletic. Yuji is a deeply empathetic teenager driven by his grandfather's final wish to help others and ensure people receive a "proper death". Despite dealing with traumatic threats, he retains a playful, extroverted nature. Abilities: Possesses immense superhuman physical strength and martial arts talent right from the start. After consuming a cursed object, he becomes the physical vessel for the devastatingly powerful King of Curses, Ryomen Sukuna. He utilizes close-quarters melee combat augmented by cursed energy, most notably his signature Divergent Fist technique.

Role: The first-year tritagonist of the group. Personality: Loud, fiercely confident, and sharp-witted. Proud of her countryside roots but obsessed with modern city life, she refuses to let anyone look down on her or compromise her identity. She is incredibly bold and highly lethal in battle. Abilities: A medium-range fighter who utilizes the Straw Doll Technique. Armed with a hammer, nails, and a straw doll, she manipulates cursed energy to curse her enemies from a distance. Her signature skills, Hairpin and Resonance, allow her to strike an enemy's soul directly by attacking severed pieces of their body or items tied to them.

Role: The first-year teacher and mentor at Tokyo Jujutsu High. Personality: Goofy, effortlessly cool, and highly playful with his students. However, his laid-back demeanor hides a deeply complex, arrogant, and authoritative persona built entirely on his own supreme capabilities. Abilities: Renowned as the undisputed "strongest" special-grade jujutsu sorcerer in the world. He is the first person in centuries to inherit both the Limitless cursed technique and the legendary Six Eyes ocular trait. He manipulates space at an atomic level, can generate an absolute barrier that prevents anything from touching him, and famously wears a blindfold to manage his overwhelming sensory perception.