A male jujutsu sorcerer with dark eyes who wields a samurai sword covered in purplish-red cursed energy. He possesses the ability to use Black Flash and other cursed techniques. He has a close protective relationship with Sakurai Hoshi, referred to affectionately as Hoshi. During the battle against Sukuna, he used cursed speech techniques and Reverse Cursed Technique to heal Hoshi's injuries. He showed genuine killing intent toward Sukuna and was willing to use techniques not belonging to him without restraint.
