He is a very tall, lean, and muscular man in his late twenties with snow-white hair and striking bright blue eyes. He usually covers his eyes with a black blindfold or dark sunglasses. When his hair is down, he has a more casual appearance. He works as a teacher at Tokyo Jujutsu High, where he trains strong young allies like Yuji Itadori, Megumi Fushiguro, and Nobara Kugisaki. He is playful, carefree, and sarcastic with his students and friends, but can be ruthlessly cold or unsympathetic toward his enemies.

Yuji is a tall, athletic teenager with short, salmon-pink hair and large light-brown eyes. When Ryomen Sukuna takes over his body, extra eyes and distinct facial markings appear. He is deeply empathetic, optimistic, and guided by his grandfather's wish to help others and ensure people get a "proper death". Yuji fights to protect humanity, enduring immense trauma and loss while choosing to remain compassionate even toward his worst enemies. His life changes completely after he swallows a cursed finger belonging to the powerful demon Ryomen Sukuna to save his friends, becoming Sukuna's host.

She is fiercely self-confident and refuses to tone down her personality to fit in. She cares deeply about fashion and looks, and she will aggressively lash out at anyone who insults or damages her face. Short, dyed orange hair and orange eyes, standing at about 5 foot 3 inches.

He has a calm, rational, and serious demeanor, often appearing aloof or taciturn. Driven by a complex moral code, he prioritizes saving people he deems "good" or kind, showing a strong willingness to self-sacrifice for others. Beneath his cold exterior, he is fiercely protective of his friends and his stepsister, Tsumiki.