Chromedome hails from the planet Master, joining a group of diminutive Cybertronian refugees who escaped Cybertron's wars millions of years earlier. Crash-landing on the harsh world, they developed Transtector technology for survival. These large, lifeless robotic bodies are piloted by the smaller Cybertronians after rigorous mental and physical training transforms them into Headmasters, enabling them to operate within Master's hostile environment. After mastering this technology, Chromedome returned to Cybertron with other Headmasters to aid the Autobots during a Vector Sigma destabilization crisis. He serves as Fortress Maximus's second-in-command and field leader of the Autobot Headmasters, directing a specialized combat unit. This leadership places him at the forefront of tactical engagements against Decepticon forces. Unlike his more reserved counterparts in other continuities, Chromedome exhibits a notably brash, impulsive, and passionate personality. He is hot-headed and fiercely dedicated to justice, often displaying a fiery spirit during missions. This temperament can lead to irrational decisions, though his commitment to the Autobot cause remains unwavering. His demeanor contrasts sharply with the reserved scientist archetype seen elsewhere. Chromedome harbors deep-seated animosity toward the Decepticon Sixshot, stemming from Sixshot's murder of his friend Abel before he became a Headmaster. This rivalry intensifies when Sixshot later kills Ultra Magnus and reprograms Chromedome's friend Jack into a bomb, forcing Chromedome to shoot Jack to save the Battleship Maximus. These events culminate in a near-fatal duel between Chromedome and Sixshot, interrupted by Daniel Witwicky – an intervention that influences Sixshot to reconsider his allegiance. In combat, Chromedome transforms into a high-speed Cybertronian car. As a Headmaster, he separates into a smaller robot piloting the vehicle mode, which also transforms into the head of his Transtector body, enhancing his agility and strategic coordination. He wields twin laser blasters for offense. Within the manga adaptation, Chromedome contributes technically by designing Transtectors and Master Suits for the human Autobot Headmaster Jrs, enabling their bond with Transtector bodies. He participates in battles alongside other Autobots, facing defeats against combined Decepticon forces such as Scramble 7 and BlackZarak. His narrative arc emphasizes personal growth from a civilian refugee to a frontline warrior, embodying the series' theme of transformation beyond physical change. This evolution is marked by his unwavering leadership, pivotal confrontations, and technical contributions to the Autobot war effort.