Jogo emerges from humanity's collective dread of volcanic eruptions and fire disasters as a Special Grade Cursed Spirit. His distinct form features pale gray skin, a volcano-shaped head crowned by a brown crater-like top, and a single cyclopean eye. Ear openings plugged with corks eject flames during rage, contrasting his black teeth. He moves with a hunched posture aided by a cane, draped in an all-black outfit accented by a yellow-spotted cape and white scarf. Personality radiates intense pride in his cursed spirit nature. He champions curses as the "true humans," born of raw negative emotion, while denouncing humans as deceitful impurities requiring eradication. This core belief fuels profound arrogance and ill temper, especially toward jujutsu sorcerers. Despite this contempt, he forms near-familial bonds and shows fierce loyalty to fellow curses like Hanami, Dagon, and Mahito. A stark hypocrisy defines him: grief over fallen curse allies clashes with his indiscriminate slaughter of humans. His driving motivation is humanity's elimination to forge a cursed spirit-dominated world. To advance this, he allies with Kenjaku (posing as Suguru Geto) and executes strategic operations, including the Shibuya Incident. Underestimating Satoru Gojo leads to a decisive defeat that instills deep fear and reshapes his approach to powerful foes. His complex dynamic with Sukuna involves forcibly recruiting the King of Curses by making Yuji Itadori consume Sukuna's fingers, culminating in a fatal confrontation. Combat prowess centers on the Disaster Flames technique, generating and manipulating volcanic fire and heat rays from his palms or environmental fissures. He summons insect-like fire projectiles via Ember Insects and unleashes the Maximum Technique: Meteor—a comet-sized fireball. His Domain Expansion, Coffin of the Iron Mountain, manifests a scorched wasteland under a blood-red sky, guaranteeing lethal heat attacks to all trapped within. Kenjaku estimates his immense cursed energy reserves equal eight or nine of Sukuna's fingers. Physically, he possesses exceptional speed and reflexes, overwhelming multiple Grade 1 sorcerers simultaneously, coupled with high durability against conventional attacks. His story culminates in the Shibuya Incident. Following Hanami's death and Dagon's defeat, he exacts fiery vengeance on sorcerers Naobito Zen'in, Nanami Kento, and Maki Zen'in. Locating Yuji Itadori, he forces consumption of ten Sukuna fingers and directly challenges Sukuna. Deploying his full arsenal, including Maximum: Meteor, proves futile against the King of Curses. Sukuna critiques Jogo's ambition to replace humans rather than embracing unrestrained destruction, yet acknowledges his strength, stating Jogo stood out among adversaries over a millennium. This validation moves Jogo to tears. His final moments conjure a vision of Dagon and Hanami, expressing hope for their reunion in a future curse-dominated world.