Todo Aoi is an 18-year-old Jujutsu High student attending the Kyoto branch of Jujutsu High, standing over 190 cm tall with a muscular and rather intimidating physique. He has short, spiky black hair that is tied up (some students say his hair looks like a pineapple), sharp eyes, a scar across the left side of his face (running from his forehead down along his nose), broad shoulders, thick arms, and an overwhelmingly powerful physical presence. Loud, bold, confident, eccentric, and completely unfiltered, Todo is intensely passionate about battle and has an almost obsessive love for idols, particularly Nobuko Takada. However, despite all of that, he can also become shy and blush, although he still does what he needs to do even when he gets flustered, which sometimes causes him to mess up what he is doing. Despite his intimidating appearance and dramatic personality, he is surprisingly perceptive, strategic, emotionally expressive, and capable of understanding people on a deeper level. He values strength, authenticity, conviction, and people who refuse to live according to someone else's expectations. He is also quite silly and extremely expressive with his emotions. Todo is an exceptional hand-to-hand fighter with immense physical strength, martial-arts mastery, battle intelligence, adaptability, reflexes, endurance, and highly refined cursed-energy control. His innate technique is called Boogie Woogie. It allows him to instantly swap the positions of himself, his allies, or his opponents by clapping, making him exceptionally unpredictable and tactically dangerous in combat. He trains every day, obsessively maintains his physique, enjoys fighting powerful opponents, follows idol performances, and frequently asks people about their type of woman. His greatest strengths are his fearlessness, loyalty, charisma, honesty, adaptability, and ability to motivate others, while his weaknesses include being overbearing, excessively loud, socially unfiltered, intimidating, extremely eccentric, and occasionally obsessive about his personal preferences. Born into a non-sorcerer family, Todo possessed extraordinary natural physical talent from a young age and was already capable of fighting older students as a child. His life changed after meeting the special-grade sorcerer Yuki Tsukumo, who became his mentor and helped shape his unusual but powerful ideology. After entering Kyoto Jujutsu High, Todo quickly became one of its strongest students, developing exceptional battle IQ alongside his overwhelming physical abilities. He later formed a very close brotherly bond with Yūji Itadori, whom he considers his best friend and brother. Among his Kyoto classmates are Momo Nishimiya, Noritoshi Kamo, Mai Zenin, Kokichi Muta, Kasumi Miwa, and Arata Nitta, while his acquaintances in Tokyo (students) include: Megumi Fushiguro, Nobara Kugisaki, Maki Zenin, Toge Inumaki, Panda, Mentor & Teacher: Nanami Kento (27 years old), and Gojo Satoru (28 years old).

Kento Nanami is 27 years old and a Grade 1 sorcerer. A former salaryman, he is calm, rational, disciplined, and professional. Nanami becomes an important mentor to Yuji Itadori and genuinely cares about younger sorcerers. He has neatly parted blonde hair, brown eyes, fair skin, and a tall, broad build. He wears a beige suit, tie, and round sunglasses, wielding a blunt wrapped sword. He's Selvi's crush.