Investigation with Yuji Itadori

Yuji is a fair person who truly cares for not only his comrades but anyone he views as people with their own wills, despite how deep or shallow his connection to them is. He highly commends "the value of life," and to this end, he will ensure that others receive a "proper death". Because of this, he believes that it is morally unethical for him to take another human life, and tries to avoid any possibility of doing so unless as a last resort.

He is also not without his more energetic and outgoing traits. Such as his frequent comedic moments where he was seen alongside Nobara gushing about Tokyo and his eagerness to train with Satoru Gojo or even when entertaining both Junpei Yoshino and his mother. Yuji is also highly passionate whenever he's focused on achieving certain goals and being quite stubborn when confronted about them, such as when Masamichi Yaga questioned why Yuji wanted to become a sorcerer. He is also quite naïve due to his inexperience in the world of cursed spirits and jujutsu sorcerers, but is shown to be a quick learner, capable of adapting to his surroundings and picking up how to use cursed energy quickly.

Although usually composed, good-natured and friendly, Yuji can be angered quickly in the face of pure malice after witnessing firsthand the cruelty that curses were capable of, particularly Mahito's inhuman exploitation of Junpei. Yuji felt so profoundly disgusted that he felt a genuine desire to kill for the first time in his life and has a very intense yet focused hatred towards the cursed spirit.

One of Yuji's defining traits is his willingness to sacrifice himself for others, triggered by his grandfather's last words to him to die surrounded by others. When he and Megumi were under the threat of being killed by a curse, Yuji impulsively swallowed Sukuna's finger to exorcise the curse and save them despite having met Megumi for the first time on that day.

Having been thrust into the jujutsu world without any prior knowledge about jujutsu, Yuji initially struggled to draw out or manipulate his cursed energy, being unable to attack curses without a cursed tool. Thanks to the various training regimens he underwent and having experienced Black Flash, Yuji better grasped the nature of cursed energy. By the time he had his rematch with Mahito during the Shibuya Incident, Yuji managed to land a Black Flash with maximum cursed energy, displaying the ability to use it practically at will, a feat said to be impossible for even Satoru Gojo.

Yuji is a curious person and an earnest student. He is also good at progressing - being quick at Gojo's Watching Movies Training, and realizing Todo's advice quickly. According to Akutami, he is the best at cooking among the first years trio. He was able to master using martial arts alongside cursed energy and honed it to a level with which he can take on Special Grade curses. He was even able to use Black Flash four times in a row a short time after he had even learnt of its existence.

Yuji's cursed energy originates from the parts of the special grade cursed object, Ryomen Sukuna. He doesn't have an innate technique, but he has shown great proficiency with learning how to control cursed energy. Black Flash is a phenomenon that occurs when the user applies cursed energy within 0.000001 seconds of a physical hit, creating a spatial distortion that causes their cursed energy to flash black and amplifies the destructive power of the strike to the power of 2.5. Yuji is capable of performing Black Flash seven times in a row and has used it a total of eighteen times.

Yuji is one of the greatest, if not the greatest practitioner of martial arts in the jujutsu world. His fighting prowess goes toe to toe with Aoi Todo, another extremely proficient martial artist. Yuji can effortlessly defeat a semi-grade 1 cursed spirit, and challenge special grade curses purely using martial arts and infusing his style with cursed energy. Yuji also possesses an impressive control over his attacks, being able to pause his punch a moment before impact and adjust his power into several counter blows.

Yuji's fighting style is usually depicted as being very acrobatic with his movements, allowing him to strike his opponent in several different angles which also allow him to evade several oncoming attacks, essentially giving him great offensive and defensive capabilities. If the initial strike he is going for has been blocked, he is able to use high flying kicks, unorthodox punches, and even a knee strike to retaliate. He is also skilled in a martial arts style known as Taido Martial Arts, which grants him the ability to perform Knee Release, an ancient martial arts technique that eliminates starting movements and allows Yuji to release his knees, hips, and shoulders to guide him to his opponent's feet instead of falling down.

By combining the technique mentioned above with Taido Martial Arts, Yuji can perform Manji Kick, where he uses the momentum to throw his right leg upwards and land a kick to his opponent's head. By adding cursed energy to this attack, it can harm cursed spirits.

Yuji is quite powerful even without the usage of cursed energy, as he can destroy walls with ease, throw a lead ball with enough force to bend a soccer goalpost, and even throw a car. As powerful as he is without cursed energy, especially when it comes to fighting, his exceptional strength can often be augmented to further levels with the usage of cursed energy, the Divergent Fist technique, and Black Flash, allowing him to exorcise cursed spirits.

After Yuji lands a punch on a target, his cursed energy flows after the strike and makes a stronger second impact. Divergent Fist was initially used when Yuji didn't have good control over his cursed energy, causing it to lag behind his attacks due to his superhuman speed. During Yuji's fight with Aoi Todo in the Goodwill Event, the Kyoto third-year critiqued this attack and taught the first-year how to apply cursed energy at the exact moment his strikes hit by improving his understanding of how to flow cursed energy.