Marouji operates as a lethal assassin specializing in jujutsu, his path briefly crossing the central story during a confrontation with samurai Kazumo Ozaki. Disguised as a government official’s guide, he sheds this facade to challenge Ozaki in a duel, defeating the warrior with calculated close-quarters maneuvers. His later encounter with the protagonist hinges on a terse observation about bloodscent—a coded exchange affirming their parallel existences as mercenaries in a lawless underworld. The narrative refrains from detailing his origins, loyalties, or inner drives, preserving his enigmatic presence as a transient force within the story’s landscape of clashing factions and morally indistinct operatives.