Jiron Amos hails from Zola's harsh Zora wastelands, where survival demands physical resilience and adaptability. As the son of the Rockman "Arms of Steel," he gained early experience in Walker Machine operation and maintenance, mining labor, and combat skills vital for the polluted environment. This upbringing under the Innocent's societal structure, designed to engineer Civilians like him for wasteland survival, forged his physical prowess and technical proficiency.

Witnessing Timp Sharon murder his parents shattered his life, leaving him with a broken arm and an unwavering drive for vengeance. He disregards Zola's three-day statute of limitations on grievances imposed by the Innocent, relentlessly pursuing Timp beyond the accepted timeframe. This consuming obsession isolates him, marking him as an outsider.

His personality exhibits intense focus, impulsiveness, and physical aggression. He frequently acts without considering consequences, exemplified by stealing the blue Xabungle Walker Machine from Elchi Cargo's landship, the Iron Gear, to chase Timp. This highlights his willingness to break rules for personal goals. His fighting style relies on brute force, favoring direct physical attacks like punching or suplexing opponents in mecha combat. He demonstrates proficiency in gunfighting and hand-to-hand combat, displaying agility and deadly marksmanship.

Relationships evolve significantly. He initially allies with the Sand Rats bandits—Rag Uralo, Chiru, Burume, and Dike—for practical aid, gradually integrating into the Iron Gear's crew. His dynamic with Rag involves frequent collaboration in Walker Machine piloting, marked by volatile behavior, including physically assaulting her during conflicts. Elchi Cargo transitions from an antagonist (after the Xabungle theft) to a trusted commander and eventual romantic partner. Their bond deepens through shared battles against the Innocent, culminating in mutual commitment despite his earlier obliviousness. Chiru, the youngest Sand Rat, frequently serves as his copilot in both the Xabungle and its successor, the Walker Gallier.

Mecha progression is central. He initially pilots one of the two titular blue Xabungles, utilizing its combining capabilities and responsive controls. He later transitions to the more advanced Walker Gallier, obtained during the Iron Gear's assault on an Innocent dome. This upgrade enhances his combat effectiveness, often piloted jointly with Rag or Chiru. His aggressive piloting style consistently emphasizes close-quarters combat.

His character development shifts from solitary vengeance to collective resistance. After infiltrating an Innocent dome, confronting Timp, and destroying a critical structure, he achieves his revenge. This act, violating Innocent authority, forces the Iron Gear into open rebellion. His focus broadens to challenging the Innocent's oppression of Civilians, aligning with the crew's struggle. He participates in key battles against antagonists like Kid Hola and Kashim King, evolving into a symbol of defiance against the three-day rule and Innocent control.

Post-revenge, he remains with the Iron Gear, facing consequences like Elchi's brainwashing by the Innocent and subsequent rescue missions. His commitment solidifies beyond personal vendetta, focusing on protecting comrades and challenging systemic injustice in a leadership role within the ongoing conflict.