Gazelleman is a Tanzanian gazelle-type wrestler who graduated as the top-ranked student from the Hercules Factory, acclaimed for his combat skills and handsome appearance. Initially assigned to protect Tokyo alongside Mantaro Kinniku as part of the new generation of Justice Chojin, his prestigious ranking and abilities are frequently overshadowed by defeats that highlight antagonist strength, gradually shifting his role toward comic relief. His combat techniques include the Antler Fist, using a glove with antlers to deliver a leaping punch, and the more potent Savannah Heat, which can split opponents into three pieces.

In the d.M.p Arc, Gazelleman attempts to discipline Mantaro but is swiftly defeated by Kevin Mask. Later, he intervenes when three d.M.p members attack Mantaro's home, only to be overpowered and injured. These injuries prevent his participation in subsequent matches, relegating him to selling merchandise and appearing as a bystander who occasionally comments on battles.

During the Hercules Factory Second Year Replacement Matches, Gazelleman faces Jade. Despite initial popularity and a sold-out audience, Jade humiliates him for being out of shape. Gazelleman gains a brief advantage when Jade loses a personal item, but exhausts his stamina due to prior inactivity. Jade defeats him with the Red Rain of Berlin, inflicting severe injuries that hospitalize him for much of the arc. He returns to support Mantaro in later tournament stages but is hospitalized again after a street encounter with Scarface.

In the Chojin Olympics: The Resurrection arc, Gazelleman returns to Tanzania, becomes its national champion by defeating Sky Crow, but loses in the preliminary rounds after falling for an opponent's trick during rock-paper-scissors, attributing the loss to excessive curiosity. He then primarily serves as comic relief, impersonating announcers with Seiuchin or claiming his losses are reverse psychology. He volunteers to replace Kevin Mask but is dismissed by peers and loses repeatedly in rock-paper-scissors to them and announcers. Later, he disguises as an elderly spectator to sway crowd support for Mantaro, though this fails.

Gazelleman reappears in the Demon Seed Arc, helping Mantaro train after a loss to Kevin Mask. He retrieves a lantern and travels with Seiuchin and Terry the Kid to the Hercules Factory's secret training grounds. There, he taunts Mantaro about Kevin to motivate him. Using robotic arms, he combines with Terry to mimic Asuraman's Ultimate Asuraman Buster technique, pushing Mantaro to develop countermeasures until the equipment fails.

A flashback reveals Gazelleman attended a Tanzanian primary school for Justice Chojin seven years prior. During a long-distance race, he stayed behind to help The Fax, tying their legs together to jump a cliff. The bond snapped mid-jump, leaving Gazelleman clinging to the ledge while The Fax abandoned him. In the present, The Fax kidnaps children and attacks Gazelleman with Paper Shooter and Paper Mummy techniques. Wounded, Gazelleman discovers friendship's strength and tags in Mantaro. Together, they defeat The Fax using Savannah Heat combined with Mantaro's Friendship Power.

Throughout his appearances, Gazelleman transitions from a highly ranked graduate to a frequent loser, yet maintains steadfast loyalty to his teammates. He provides tactical support, participates in training, and occasionally reveals deeper motivations like his commitment to friendship despite repeated setbacks.