Antonio Kanji Igari, known professionally as Antonio Igari or Anton and nicknamed "The Killer", embodies the motto "Fierce Fighting Spirit". This professional wrestler, approximately 50-60 years old, stands 191 cm (6'3") tall and weighs 105 kg (231 lbs). He possesses black hair, black eyes, a prominent jawline, and bears visible scars on his face and neck from an encounter with Sikorsky. Outside the ring, he dresses formally in suits; inside, he competes in sport briefs and wrestling boots. His fighting style merges professional wrestling with psychological manipulation and unorthodox tactics. Key techniques include the Knuckle Arrow (a hair-grabbing punch), Medula Chop, dropkick, Backdrop suplex, pressure point strikes inducing temporary paralysis, and crotch kicks. He strategically employs acting and deception, such as feigning surrender against Baki Hanma or hiring an actress to impersonate Baki's deceased mother, to unsettle opponents. Physically, he utilizes hypermobility for acrobatics, enhanced senses detecting threats outside his vision, and damage reduction through mental preparation for impacts. However, his reliance on anticipating attacks leaves him vulnerable to unexpected strikes, and his grappling techniques assume opponents share his physique, allowing smaller foes escape opportunities. Igari's strength fluctuates with audience engagement. Backstage, he often appears weary, but spectator energy transforms him into a formidable performer, earning recognition as Japanese pro wrestling's most charismatic figure. He employs ruthless pragmatism in fights yet acknowledges personal limits and respects skilled fighters like Kinryuuzan and Mount Toba. He reacts angrily to disrespect, as shown when provoked by Shuumei Kanou or Rob Robinson. In the Maximum Tournament, he defeated Rob Robinson in his first match via suplex after a headbutt broke Robinson's guard. His second match pitted him against sumo yokozuna Kinryuuzan and involved psychological warfare, including mimicking sumo stances and manipulating footwork to draw a sumo ring (dohyou) around them. The match concluded when Kinryuuzan's master forfeited after Igari used a forbidden sumo hold (Double-Arm position). Igari later faced Baki Hanma in the quarter-finals, employing psychological tactics and pressure point strikes but ultimately losing. After the tournament, Igari kidnapped and tortured Sikorsky in a gym, leading to a near-fatal counterattack where Sikorsky inflicted severe facial injuries. Igari survived and later appeared during Jack Hanma's confrontation with Sikorsky and Gaia. He witnessed Mohammad Alai Jr.'s challenge against Baki and informed Jack of Baki's rematch with Yujiro Hanma. A memorial chapter depicted an elderly Igari assaulting an MMA fighter inside an octagon, resulting in his arrest. This narrative followed the real-life death of Antonio Inoki, the wrestler inspiring Igari. The story concluded with Igari's implied death.