Papu emerges as a small, mysterious creature Prince Pinon encounters within the Dragon Shrine near Popolocrois Castle. Their meeting occurs during a monster attack, an event triggering the awakening of Pinon's latent elemental powers. Cute and playful by nature, Papu swiftly forms a bond with the prince and joins him on his journey.

Papu becomes one of Pinon's guides, aiding him in navigating the challenges stemming from the disruption of the natural elements threatening Popolocrois. The creature possesses a direct connection to the Wind Seirei, linking it intrinsically to the kingdom's elemental imbalance. Papu's presence proves instrumental in facilitating Pinon's journey into Fantasia, the spirit world, where Pinon, Luna, and Marco strive to prevent a great calamity.

Throughout the adventure, Papu acts as part of Pinon's core group alongside Luna and Marco. The creature's actions support the group's efforts to confront the darkness enveloping Popolocrois and understand the origins of the elemental disturbances. Papu consistently serves as a supportive companion, fundamentally tied to the wind element and the overarching quest to restore balance.