Mari emerges as a shadowy kunoichi antagonist in the animated film adaptation, her steel-gray hair coiled into sharp twintails and her face framed by a tactical scarf. Ochre markings accentuate her features, with one piercing eye often glimpsed through her uneven bangs. Tasked by a youth named Jyun, she relentlessly hunts the protagonist across a perilous island voyage, clashing repeatedly with his enigmatic bodyguard.

Their initial skirmish reveals the bodyguard’s restraint—fighting left-handed while concealing her grotesque armored right limb. When Mari forces a second confrontation, the bodyguard unleashes the monstrous gauntlet in the battle’s decisive strike, its abrupt activation left unexplained. Mari’s origins and deeper allegiances remain veiled, her existence defined solely by her lethal vendetta, with no elaboration on her metamorphosis or connections beyond her role as Jyun’s blade. Supplementary media, including manga and spin-offs, offer no expansion on her fractured narrative.