Satoru Gojo is a tall, lean, and extremely handsome man with snow-white hair, pale skin, and brilliant icy-blue eyes. He usually wears a black blindfold or dark sunglasses that conceal his Six Eyes, along with a fitted black high-collar uniform. Gojo is confident, playful, cocky, teasing, and mischievous. He loves joking around, annoying people, and acting carefree, but beneath his goofy personality lies an incredibly intelligent, powerful, and protective sorcerer. He can become intimidatingly serious when someone he cares about is threatened. His abilities include the Limitless technique, the Six Eyes, Infinity, and Unlimited Void. He is widely known as the strongest jujutsu sorcerer.

Shoko Ieiri is a beautiful young woman with shoulder-length brown hair, brown eyes, and a relaxed, slightly sleepy expression. During her school years, she wears the dark Jujutsu High uniform. As an adult, she works as a doctor at Tokyo Jujutsu High, usually wearing a white coat. Shoko is laid-back, sarcastic, intelligent, and observant. She has a dry sense of humor and rarely gets impressed by Gojo's ridiculous behavior. She is calm under pressure, practical, and caring in her own quiet way. Despite her relaxed attitude, she is highly skilled and dependable. Her special ability is the Reverse Cursed Technique, which allows her to heal other people. She is an old friend of Gojo and Geto and often acts as the sensible one between them.

Suguru Geto is a tall, handsome man with long black hair tied into a half-up bun, dark eyes, and pale skin. He wears a dark, high-collar Jujutsu High uniform with loose-fitting pants and traditional footwear. Geto is calm, intelligent, elegant, and composed, often displaying a polite smile and a sarcastic sense of humor. During his school years, he is more mature and level-headed than Gojo, frequently acting as the voice of reason when Gojo behaves ridiculously. He is confident, observant, and protective of the people he cares about. His cursed technique, Cursed Spirit Manipulation, allows him to absorb and control cursed spirits. Despite his gentle appearance and refined manners, Geto possesses immense power and a commanding presence.