Justice, born James Holloway, reigned as a prince of Lendard in the Kaede Cosmos, bound by a childhood betrothal to Elsie Crimson to secure political unity between their kingdoms. Their alliance shattered when Elsie revealed her kingdom’s creation of cosmos-threatening weapons, sparking a war that obliterated his home. Devastated, he discarded his name and lineage, reborn as "Justice" within the Interstellar Union Army. Rising to command the Angel Feather carrier and join the Oración Seis Interstellar as the "Celestial Judge," he became a symbol of retribution.

A fusion of unyielding discipline and vengeful fixation, Justice relentlessly hunts Elsie, blaming her for his kingdom’s fall. Yet beneath his ruthless exterior lies a flicker of empathy: he reprimands allies for disregarding civilian lives during the Guilst Chronophage crisis. His obsession narrows his focus, sidelining existential threats like Ziggy’s Foresta machinations to prioritize Elsie’s capture.

His combat prowess stems from the Star Drain Ether Gear, siphoning planetary Ether to forge weapons and unleash techniques—Meteor’s lightning-speed assaults, Grand Chariot’s searing energy beams, or conjuring the Antares spear and Ether katana. Enhanced physical capabilities place him at Large Planet-level strength, amplified post-timeskip. Vulnerabilities linger in EMP susceptibility and Ether Gear’s dependence on unimpeded hand motions.

Pivotal clashes pit him against Elsie, Shiki Granbell, and God Acnoella. On Foresta, he subdues Homura Kōgetsu and scorns Shiki’s pleas due to his ties to Elsie. Post-timeskip power surges let him match Elsie’s might but falter against Acnoella’s resilience. His arc embodies the tension between unflinching duty and consuming vendetta, casting him as both enforcer and antagonist amid the cosmos’ escalating strife.