The Unicorn is the protagonist of the story. She leaves the safety of her forest upon learning that she is the last unicorn in the world, with information about the Red Bull as her only clue. When she first encounters the Red Bull, Schmendrick manages to inadvertently change the Unicorn into a human female to confuse the Red Bull and force its withdrawal. Schmendrick calls her "Lady Amalthea" so as not to arouse King Haggard's suspicions. Her alias evokes the Greek goddess Amalthea.[6]
