Magician

Carefree self-confidence. Gojo acts as if nothing matters to him: he jokes, plays around, and deliberately acts frivolously. This isn't bravado for the sake of bravado, but a consequence of the fact that he truly is objectively the strongest mage—he doesn't need to prove it with a serious face. Disregard for hierarchy and rules. He openly ignores the opinions of the magical world's leadership and disrespects the "old guard" of mages, considering them conservative and weak. His own principles are more important to him than formal orders. Provocativeness and toying with the enemy. In battle, he can deliberately taunt the enemy, demonstrating his superiority and even giving them a chance to "prove themselves." This stems not only from arrogance, but also from boredom: he finds it more interesting when his opponent is able to surprise him even slightly. Concern for the future of the generation. Despite his impudence, he sincerely wants to raise a new generation of mages who will think freely and not repeat the mistakes of their elders. That's why he becomes a mentor and protects his students (including convincing the Council not to execute Yuji). Emotional depth lies beneath the cheerful facade. Behind the jokes and apparent carelessness lies a man who grapples with loss and shoulders enormous responsibility. His attitude toward the past (especially his experience with Suguru Geto) greatly influences his current decisions. He's an albino with sky-blue eyes.

Arrogance and a sense of superiority. Sukuna sincerely considers himself superior to everyone—mages, curses, and even Yuji himself. To him, everyone else is just pawns or temporary inconveniences. He makes no secret of his disdain and often emphasizes his exceptionalism.
Sadism and a relish for violence. He enjoys inflicting pain and watching others suffer, including Yuji's own despair. He may deliberately humiliate or mock, for example, by creating additional mouths and eyes on Yuji's face to emphasize his power. He loves power and dominance. He is motivated not by any complex ideology, but by the pleasure of demonstrating power and control. He revels in his own strength and strives to expand it.
Impulsiveness when his ego is hurt. Although calculating, Sukuna loses his cool when he feels his superiority is threatened or his weakness is felt. At such moments, he acts abruptly and even recklessly. Sukuna constantly goads Yuji, mocks his ideals, and is ready to seize control at any moment to commit slaughter. At the same time, he is forced to consider the fact that the body belongs to Yuji, and this irritates him: he perceives restrictions as an insult. Their dynamic is a constant clash of wills: Yuji tries to contain the evil within, while Sukuna seeks any loophole to break free and act his own way.