Lunlun, called Flower, is a 15-year-old orphan raised by her florist grandparents in France. Her mother, a descendant of Flower Star plant spirits, ties her to a celestial lineage, entrusting her with finding the mythical Seven-Colored Flower to crown the star’s new ruler. Though tomboyish and blunt in her youth, her quest across Europe and Northern Africa awakens a deep empathy, compelling her to mediate conflicts rooted in fractured families, environmental crises, or societal oppression.

A magical pin from the Flower Star’s king fuels her mission, enabling transformative attire shifts and temporary skills—like mountaineering or aviation—activated by the phrase *Fu Flay Lu Fey Lora*. When destroyed during a perilous fall, the pin is replaced with a sterner version: its loss or breakage would exile her from Earth forever. Each transformation blooms with floral designs tied to the "language of flowers."

Her companions—an anthropomorphic dog and cat, initially dispatched to find the Flower Star heir—join her travels. Antagonists Togenishia and Yabouki pursue the flower for personal gain, but Lunlun thwarts their schemes with aid from Serge, a enigmatic photographer who scatters symbolic flower seeds among those she helps. Revealed as the Flower Star prince, Serge forsakes his throne to stay with her, though Lunlun postpones royal duties to cherish her earthly bonds.

In *Hello Cherry Country*, she defends Japan’s cherry blossoms from pollution and sabotage, cementing her environmental advocacy. The Seven-Colored Flower eventually sprouts in her grandparents’ garden, nurtured by seeds from those she aided—a testament to her enduring influence. Later tales, including a 2024 sequel introducing protagonist Lumi, honor Lunlun’s legacy as a bridge between worlds, her story forever rooted in growth, kinship, and the fragile beauty linking humanity and nature.