Florence begins as a flower fairy inhabiting Flower Land, a realm of sentient flowers and mischievous treble notes. Her first contact with the human protagonist occurs when he revives a dying begonia in his greenhouse; she appears to thank him for his care of plants, establishing her as a bridge between the human world and her enchanted realm.

She wields a specialized wand to traverse between worlds, using it to transport the protagonist to Flower Land after his expulsion from music school. Acting as his guide, she helps him realize his passions for botany and music can coexist harmoniously. Lacking physical wings, Florence floats effortlessly, primarily hovering and drifting weightlessly through environments.

Her musical expression manifests uniquely through "My Name is Florence," a distinctive vocal performance standing out within the otherwise classical soundtrack, serving as her personal introduction and affirmation of identity. Journeying through Flower Land, she demonstrates protective abilities, neutralizing insect threats via bubble-based containment.

Her narrative arc concludes with sacrifice: prolonged human world exposure irreversibly severs her connection to Flower Land, preventing her survival and culminating in her dissolution into morning dew. Before this transformation, she delivers a final request urging the protagonist to recommit to his musical education while preserving his botanical interests. Her departure catalyzes his return to music school and subsequent successful career as a musician.