A devoted, highly romantic bird who lives in the garden outside the Student's window. She values pure love above all material wealth, viewing emotional connection as the highest ideal. Recognizing the weeping boy's sorrow, she resolves to help him secure a red flower, seeing him as the true lover she often sings about.

A learned young man who possesses vast knowledge of philosophy and logic but struggles with emotional matters. He views the world through a strictly rational, practical lens and relies heavily on dusty books for his understanding of life. He becomes entirely consumed by his inability to meet the demands of the girl he wishes to court.

A young woman of high social standing whose affection the Student desperately seeks to win for a ball. She spends her time winding luxurious blue silk and enjoys the attention of wealthy suitors. She measures value through material worth rather than emotional sincerity.

A plant in the garden that usually bears red flowers but has suffered severe damage from winter frost and storms. It communicates honestly with the Nightingale about its inability to produce a blossom through normal means.

A cynical reptile residing in the garden near the weeping boy. He represents a highly practical, unromantic worldview and openly laughs at the concept of shedding tears over something as simple as a flower.

A large, deeply rooted tree in the garden who harbors a genuine affection for the Nightingale. Unlike the intellectual human characters, he understands the depth of the bird's emotions and appreciates the pure beauty of her music.

An insect in the garden who, alongside the Lizard and Daisy, questions the Student's dramatic display of sorrow.

A flower in the garden that joins the chorus of small natural voices questioning why the Student is crying over a red rose.