Prince Zeke originates from Tsumugi's doll collection, brought to life within the artificial Doll Kingdom—a realm crafted by Phantom Empire commander Black Fang solely for Tsumugi. This world was designed to grant her perpetual dancing joy after an invisible accident confined her to a hospital bed, stripping her ability to walk and dance in reality.

Zeke exhibits an elegant, charming demeanor marked by unwavering loyalty to Tsumugi. His royal aesthetic includes dark blonde neck-length hair with a peekaboo bang over his left eye, cyan eyes, and attire comprising a sleek white long-sleeved top, dark velvet bow tie, platinum gloves, blue pants, and dark gray shoes. He consistently wields a sword with a brown-and-gold cover and matching scabbard.

As prince of the Doll Kingdom, Zeke encounters the visiting HappinessCharge Pretty Cure team. Cure Princess develops immediate romantic interest during their meeting, but Zeke’s devotion remains entirely fixed on Tsumugi’s well-being. This loyalty compels him to attack Cure Princess using man-made Saiarks, exposing his true nature as Tsumugi’s doll and shattering Hime’s romantic hopes. He explicitly states his commitment to Tsumugi precludes romantic involvement with Hime.

Zeke’s existence hinges on Tsumugi’s happiness. Upon discovering Black Fang numbed Tsumugi’s legs and cultivated her despair to fuel his own power, Zeke makes a pivotal choice. He and the other dolls sacrifice themselves, freeing the captured Cures, enabling Megumi to reach Tsumugi, and allowing Tsumugi to confront her despair and rediscover happiness beyond dancing. This sacrifice directly facilitates Tsumugi’s return to the real world and the recovery of her ability to walk.

Zeke’s background—detailing his creation, purpose in the Doll Kingdom, and ultimate fate—is fully explored within the movie, tied to Tsumugi’s emotional journey and liberation from Black Fang’s manipulation.