Peter leads the children living on an island ruled by the Fountain of Youth. He uses the fountain's power to transform captured adults back into children, ensuring eternal childhood for the inhabitants. His core belief is that preserving childhood innocence shields them from adult burdens like materialism, war, and socioeconomic pressures, allowing them to embrace joy and imagination freely.

He initially embodies carefree eternal youth, viewing adulthood as a state to avoid. His encounter with Momo challenges this perspective. Through their interactions, Peter learns that maturity and responsibility hold value at any age. Momo shows him that confronting problems directly is essential while retaining childlike wonder. This experience causes Peter to reevaluate his convictions, acknowledging that while playfulness remains important, serious effort and facing challenges are sometimes necessary.

Peter actively protects the Fountain of Youth from an unnamed evil organization seeking to exploit its power. He engages in direct conflict with these antagonists to safeguard the island's magic and way of life.

This character adapts the Peter Pan archetype within the story, presented without traditional elements like Captain Hook or Tinker Bell. His background prior to the island and his exact connection to the fountain remain undefined within the available material. His character appears and develops solely within the events of *La Ronde in my Dream*, not featuring in other *Minky Momo* franchise installments like the television series (1982-1983 or 1991-1992) or subsequent OVAs such as *The Bridge Over Dreams* (1993) or *The Station of Your Memories* (1994).