Mount Toba, originally named Shouhei Toba, is a globally recognized veteran professional wrestler around fifty years old. Standing 209 cm (6'10") tall and weighing 150 kg (330 lbs), he ranks among the tallest characters in the series. He possesses short black hair, an elongated face devoid of facial hair, and a physique that appears less heavily muscled than some fighters but becomes impressively defined when tensed during warm-ups or his signature "Pump Up" defensive technique. Typically calm and composed with minimal outward emotion, Toba transforms during combat, earning the moniker "Giant Devil" due to his intense ring demeanor. He embodies honor, refusing surrender even when facing inevitable defeat, believing quitting offers no honor. After his master Rikigouzan's murder in a street fight, Toba adopted the conviction that a professional wrestler must never lose in any combat form. This drove him to intense training, shifting his perspective from viewing wrestling solely as entertainment to treating it as a serious discipline. He respects fighters like Kanji Igari, sharing a competitive yet friendly relationship while admitting envy toward Igari's less damaged body at their age. Toba's fascination with professional wrestling began in youth, heavily inspired by the legendary Rikigouzan. Joining Rikigouzan's club, he initially expressed a desire to entertain over focusing on strength. Rikigouzan challenged this view, attacking Toba before later conceding entertainment's importance while stressing wrestling's seriousness. Under Rikigouzan's mentorship, Toba rose as a popular fighter. Following his master's murder, Toba intensified his training, determined to ensure pro wrestlers never lost in any confrontation. In the Underground Arena Saga, Toba attacks Junichi Hanada, who was scheduled to fight Baki Hanma next. Criticizing Hanada's disregard for pro wrestling, Toba incapacitates him to prevent him representing the style. Toba then faces Baki, employing wrestling techniques including his signature body drop. Though he damages Baki early, Baki targets Toba's face and limbs, counters the body drop, and injures Toba's knee. Unable to continue but unwilling to yield, Toba accepts being knocked out by Baki as an honorable conclusion. Post-fight, he acknowledges Baki's respect for not forcing him to quit. During the Maximum Tournament Saga, Toba participates as a reserve fighter. His entrance dramatically crushes a car by falling onto it from height, showcasing his durability. He comments on matches involving fellow wrestlers like Kanji Igari, highlighting wrestling's uniqueness. Toba's tournament opponent is Kaiou Retsu, who aims to end the fight within a minute. When Retsu targets Toba's previously injured knee, Toba unexpectedly forfeits. This decision contrasts with his refusal to surrender against Baki, possibly reflecting pragmatism due to his injury or viewing the match as a professional obligation rather than a personal test of honor. Toba's fighting style centers on professional wrestling, incorporating strikes, grapples, and high-impact moves like the body drop, 16 Mon Roundhouse Kick, suplex, stomp, sleeper hold, chicken wing facelock, and Nouten Karatakewari. His "Pump Up" technique enhances defensive readiness through muscle tension. Statistically classified as Tier 8-A, his combat capabilities include multi-city block level attack potency (238.9 tons), massively hypersonic speed (Mach 302), and class M physical strength (246 kilotons). Weaknesses involve his size potentially hindering agility and susceptibility to targeted joint attacks, demonstrated against Baki and Retsu.