Vilar acts as a primary antagonist and loyal henchman under Kochel van Stenwald, enforcing authority through intimidation and violence. His left eye swells and glows crimson when activating hypnotic powers, simultaneously turning victims’ pupils red during control. He wields a uniquely designed sickle, manipulating its flight and levitating it at will. His signature phrase, "What color is your Karma?" precedes violent assaults. Introduced abruptly in an empty corridor during an escape, he smashes two sky pirates' heads against a wall while locking eyes with witnesses. Vilar brainwashes individuals like Fujiko Mine and Daisuke Jigen, forcing them to attack allies against their will; this control breaks instantly at his death. He meets his end when Jigen appropriates the catchphrase and delivers a fatal headshot. Vilar’s narrative arc remains confined to this storyline without broader franchise development.