Ikkyu emerges as the central antagonist within the "Millionaire Village" narrative, appearing as a childlike figure with an enlarged head, bulbous eyes, and disheveled hair crowned by a braided crest. His attire—a formal dark butler uniform with a bow tie and checkered trousers—contrasts his eerie presence. Adaptations, such as the live-action drama, modify his design to a plainer yet unnerving aesthetic, featuring a bob haircut and Hikimayu-style white painted eyebrows. Acting as the Mountain Gods’ steward, Ikkyu ruthlessly imposes the village’s rigid etiquette laws, dictating inhabitants’ fortunes through their adherence to protocol. Violators of his arbitrary trials endure devastating punishments, including the deaths of family members. His expressionless demeanor masks faint flickers of reaction, though he maintains clinical detachment while enforcing rules. Uniquely, he retains awareness under the effects of Rohan Kishibe’s Stand, Heaven’s Door, a resilience never clarified in canon. Within the core story, Ikkyu subjects Rohan and Kyoka Izumi to escalating etiquette tests, from tea-drinking posture to seating arrangements. After Izumi’s third infraction, her relatives die in a vehicular accident. Rohan later triggers the village curse via Heaven’s Door, prompting Ikkyu to retaliate by exploiting a technicality that induces Izumi’s cardiac arrest. A final challenge involving corn consumption sees Rohan outwitting Ikkyu by altering his perception of tatami mat boundaries, reversing the curse. The live-action adaptation heightens Ikkyu’s malice, framing him as an active saboteur who engineers unwinnable scenarios—such as serving corn in a way that strains Rohan’s physical limits—to guarantee failures. This iteration amplifies his cunning and visible fury when defeated, deviating from his original stoicism. Ikkyu’s origins and ties to the Mountain Gods remain shrouded in mystery, his existence solely defined by executing the village’s supernatural mandates. While his devotion to etiquette as an unassailable principle remains constant across portrayals, adaptations diverge in his emotional range and tactical cruelty, cementing his role as an enigmatic arbiter of fatal tradition.