Kanji Igari achieves global fame as the professional wrestler Antonio Igari, also known as "Anton" or "Killer," guided by the motto "Fierce Fighting Spirit." He possesses an imposing physique, standing 191 cm tall and weighing 105 kg, with a strong jawline, black eyes, and black hair. Facial scars appear later after an encounter with Sikorsky. In the ring, he wears sport briefs and wrestling boots; outside combat, he favors formal suits, shifting from black in earlier appearances to light blue later. His personality merges charisma and cunning. He thrives on audience adoration, drawing strength from crowds during fights, transforming from privately reserved to dynamically performative in the arena. To secure victories, he employs psychological manipulation and dirty tactics: feigning surrender, targeting vulnerabilities like kicking Baki Hanma in the groin, or hiring an actress to impersonate Baki's deceased mother. Despite this, he demonstrates respect for formidable fighters like Kinryuuzan and Baki, honestly acknowledging his own limitations. He reacts fiercely to perceived disrespect, as shown when provoked by Shuumei Kanou or Rob Robinson. His behavior consistently blurs genuine emotion and performance for spectators. Igari's combat style centers on professional wrestling, augmented by tactical ingenuity and unorthodox methods. He utilizes headbutts, suplexes, backdrop throws, and the "Knuckle Arrow," alongside acrobatic maneuvers like drop kicks and the "Medula Chop." His repertoire incorporates soft martial arts principles for paralysis induction via pressure points, capable of immobilizing opponents for up to 10 seconds. He mentally prepares for impacts to mitigate damage. Strategic psychological warfare complements his physical approach, leveraging feints, deception, and public appeals to unsettle adversaries. Enhanced senses allow him to detect threats outside his vision, including ominous auras. Notable battles in the Maximum Tournament highlight his adaptability. Against Rob Robinson, initial disinterest shifted as he harnessed crowd energy to dominate, blocking strikes and finishing with a decisive suplex or repeated backdrops in the anime. His fight with Kinryuuzan involved grappling exchanges and psychological provocation: mimicking sumo stances and manipulating footwork to draw a sumo ring around the yokozuna. Kinryuuzan's master conceded after Igari applied the match-ending "Double-Arm" sumo hold. Post-fight, Igari expressed frustration over the unresolved conclusion but vowed to win the tournament in Kinryuuzan's honor. He later faced Baki Hanma in the quarter-finals, employing begging and dirty tactics before losing. Beyond the tournament, Igari appears sporadically. He survives a brutal assault by death row convict Sikorsky during an interrogation attempt, acquiring permanent facial scars. He resurfaces in arcs involving Mohammad Alai Jr., observing fights and relaying news of Baki's challenge to Yujiro Hanma. A 2022 memorial storyline honors his real-life inspiration, Antonio Inoki, depicting an elderly Igari assaulting an MMA fighter in an octagon before his implied passing. His background includes early interactions with figures like Mitsunari Tokugawa, whom he informed of 13-year-old Baki's exploits defeating formidable opponents. An anime-exclusive scene shows him advocating for diverse fighting styles in Tokyo's Underground Arena and surviving an attack by martial artists alongside Kiyosumi Katou. His history with Mount Toba is explored in the spin-off "Grappler Baki Gaiden: Antonio Igari vs Mount Toba," though specific events remain undetailed in available sources.