Kento Nanami

Kento Nanami is one of the most popular supporting characters in Jujutsu Kaisen.

He's a Grade 1 jujutsu sorcerer who works as a salaryman-like figure in the jujutsu world — very professional, pragmatic, and no-nonsense. Nanami is in his late 20s, tall, blonde-haired, and almost always seen wearing his signature tan suit, tie, and small, rounded sunglasses (even during combat).

Personality-wise, he's calm, composed, extremely disciplined, and values efficiency above all else. He famously hates working overtime and has a very adult, realistic outlook on life, often contrasting with the more idealistic or chaotic younger sorcerers like Yuji and Gojo. Despite his stoic and sometimes cold demeanor, he’s deeply responsible, cares about protecting the younger generation, and has a strong moral code.

His cursed technique is called Ratio Technique (or 7:3 technique), which lets him create a weak point/critical hit line at a 7:3 ratio on his target's body, guaranteeing a powerful strike when he attacks that exact point.

He's widely regarded as one of the "coolest adults" in the series and has a very memorable presence despite relatively limited screen time.