The Girl is a feminine character who possesses unique blue skin. Instead of showing her true color to the world, she chooses to conceal it. She spends her life searching for another person who shares her distinctive trait, moving through the world with a sense of hidden longing and melancholy.

The Boy is a masculine character who shares the same rare blue skin as the girl. Like her, he keeps his true identity masked from the outside world. He goes through life looking for someone else with his condition, searching for someone who understands his hidden individuality.

The Speaker acts as the omniscient narrator of the poem. This voice observes the lives and hidden truths of both the boy and the girl without intervening. Operating with a tight, controlled tone, the speaker knows about the characters' secret blue skin and watches their lifelong search for connection.