The story ends with Leo finding a small, unassuming gift left for him by Stargirl: a single bluebird feather. He is left pondering the meaning of the gift, and the mysterious nature of Stargirl's departure.
The ending is open to interpretation:
* Stargirl's departure is a metaphor: Some readers interpret Stargirl's leaving as symbolic of the inevitable loss of innocence and the crushing conformity of high school.
* Stargirl found her true self: Others believe that Stargirl, who was always somewhat of an outsider, decided to leave Mica High and find a place where she could be true to herself, free from the pressures of fitting in.
* Stargirl will return: Some speculate that Stargirl's departure is temporary, and she will eventually return to Mica High.
Ultimately, the ending leaves the reader with a sense of bittersweetness and reflection on the true meaning of individuality and acceptance. It encourages readers to ponder the choices they make and the impact their actions have on those around them.