Lord Peter Kensington rules a society of children on a mysterious island, sustaining their eternal youth through a fountain of youth. He champions a philosophy of absolute rejection of adulthood, viewing childhood as a state of purity and freedom from adult burdens, materialism, and conflicts like war. This stance positions him as a deliberate counterpoint to Minky Momo, contrasting her ability to temporarily mature to solve problems with his desire to escape adulthood forever.

His background connects to classic literary inspiration, though this version lacks traditional figures like Captain Hook or Tinker Bell. Lord Peter enforces his ideals by transforming stranded adults into children, forging a community insulated from adult concerns and strife. This practice stems from his core belief that preserving childhood innocence inherently prevents engagement with adult hardships.

Throughout his story, clashes with Minky Momo directly challenge his worldview. Her argument that maturity and responsibility—qualities she embodies despite her age—are necessary virtues contests his escapism. Their ideological conflict escalates into physical confrontations, culminating in a swordfight symbolizing their opposing ideals. Ultimately, Lord Peter undergoes a transformation, recognizing that a life devoted solely to play cannot confront serious challenges, marking a shift toward acknowledging the value of facing adversity.