Light Newman is a British teenager from the United Kingdom, with political lineage through his grandfather's parliamentary service and his father's leadership of the Earth Federation's European branch after its reorganization from the Earth Alliance. As a 17-year-old military trainee at Alucard colony's astronaut academy, he initially voiced pessimism about Earth's chances against the United Lunar Empire Giganos.

During Giganos' assault on Alucard, Light fled alongside friends Kaine Wakaba and Tapp Oceano. They discovered a mortally wounded Giganos operative, Schmark, who mistook them for allies and provided activation disks for advanced weaponry. Pursued by enemy forces, the trio used these disks to pilot three prototype Metal Armors called Dragonars. Light commanded Dragonar-3, an electronic warfare-specialized unit he affectionately nicknamed "D3-chan," abruptly propelling them into frontline combat roles within the Earth Federation Military.

Despite his family's leadership background, Light avoids command positions. He exhibits natural aptitude for information gathering, electronic systems, and strategic analysis—skills aligning with Dragonar-3's support functions—and demonstrates technical proficiency in computers and battlefield data processing. Throughout conflicts, he maintains a calmer demeanor than his fellow pilots during high-stress scenarios, sometimes casually referencing grave risks like execution during covert operations. He also experiences introspection, questioning whether prolonged combat exposure has desensitized him to violence and death.

Light's operational contributions center on electronic countermeasures, intelligence analysis, and tactical support against Giganos forces. His character arc evolves from a reluctant trainee thrust into warfare to an adaptive warrior reconciling technical expertise with the psychological toll of battle.