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Mahito is a human-looking cursed spirit with a patchwork face and gray eyes. (In the anime, Mahito has heterochromia, as his left eye is dark blue and his right eye is gray.) He has long, grayish-blue hair that reaches past his neck and is divided into three large strands with loops at the ends. Along with his face, Mahito has stitches all over his body that give him the appearance that he has been stitched together.

Mahito typically wears a black shawl that is separated into three pieces on the left sleeve. He also wears matching pants with and sometimes without white shoes.

Mahito is a sadistic and immature cursed spirit who enjoys toying with human emotions. He believes that he was born from human transgressions and considers himself the very manifestation of humans' hatred for each other. As such, Mahito believes that humans should be extinct and the cursed spirits should rule in their place. Mahito has no sympathy for human lives and seems to place little value even on his own life. He is dedicated to his cause, believing that reviving Sukuna is more important than his own well-being. As long as the cursed spirits eventually reign supreme, Mahito does not care if he is there to see it. Unlike his ally Jogo, who is very short-tempered and arrogant, Mahito manages to remain relatively calm and is playful by nature. Even so, they agree on the same goals when it comes to their race. Mahito as extremely immature and has a superficiality about him similar to Satoru Gojo. He enjoys toying with humans, even in battle when his life is at stake. Mahito befriended Junpei because he saw him as a toy that could be fun to play with. He coerced Junpei into becoming a curse user by feeding on his hatred. When his toy became useless, Mahito used it as leverage against Yuji and even killed him without a second thought. Mahito is also very philosophical when it comes to the concept of souls. He believes that the human soul came before the body and is intrigued by the very nature of the soul. His curse technique is derived from this obsession, and he uses it to experiment on human victims in order to gain more knowledge.

masculine

Special Grade Curse.

Mahito is 1.79 m tall.

Mahito is an unregistered Special Grade cursed spirit who eclipses the power of at least three of Sukuna's fingers. He is younger than Jogo and as a result is less experienced and not as powerful. Despite this, Mahito is far above what a Special Grade cursed spirit would normally be. He has very high intelligence and an extremely dangerous cursed technique. Mahito has incredible development potential, as on several instances he has developed in the midst of battle. In a one-on-one fight, he was able to overpower the Grade 1 sorcerer Kento Nanami, rendering his cursed technique useless. After this fight, Nanami believed that Mahito had to be exorcised immediately or else he would become too frightening for Jujutsu High to handle. In Mahito's two-on-one battle with Nanami and Yuji, Mahito would have likely defeated both jujutsu sorcerers if not for Sukuna's intervention. During this fight, Mahito was able to grow stronger while his life was in danger, allowing him to achieve the ability to conjure his own Domain Expansion. Later, during the Shibuya Incident Arc, Mahito went beyond his limits, being able to create entire clones of himself that were indistinguishable from the original, while also developing his Soul Manipulation abilities. During his fight with Yuji and, later, Todo, he managed to land multiple black flashes on the two, allowing him to gain enough understanding of the cursed energy and his own soul to activate Distorted Instant Killing Spirit Body, further increasing his power.

Mahito has great physical strength. He mercilessly beat Yuji Itadori in their second fight, enough to make the latter cough up blood. By transforming his body with Idle Transfiguration, he delivered a blow to Yuji that was so powerful that it caused him to bleed from his forehead. Mahito stated that if he had exerted more effort, he could have cracked Yuji's skull. He could easily destroy numerous Mechamarus and was strong enough to knock Nanami away. When enhanced with Black Flash, Mahito's blows can be so powerful that they made Todo cough up blood, despite the latter concentrating his cursed energy.

Mahito possesses very high intellectual ability, especially for a cursed spirit. He was able to accurately deduce that jujutsu sorcerers were investigating him and was able to set a trap for his pursuers. Mahito can also surmise his opponent's skill level and even their cursed technique after only a few exchanges. He was able to do this accurately against Nanami and was able to realize that Yuji had the ability to see souls thanks to his relationship with Sukuna. He is also very skilled at using a variety of tricks to deceive his opponents. Along with Suguru Geto, Mahito often acts as the brains of his faction's operation.

Mahito is exceptionally difficult to kill. Not only does his cursed technique render physical attacks meaningless, but even Mahito's soul is extremely resistant to damage. Nanami tried to crush Mahito's body, but he went through the entire battle without expressing that he felt any pain, even when the attacks landed. When Yuji was able to strike Mahito's soul and both jujutsu sorcerers overpowered Mahito, he was able to weather the storm and unlock new power instead of allowing his body to crumble under the pressure.