who is the tin man in wicked

The Tin Man in Wicked is Boq, a nervous Munchkin who attends Shiz University with Elphaba and Glinda. Boq becomes the Tin Man after a tragic accident involving a spell cast by Nessarose, Elphaba's sister, that shrinks and takes away his heart. To save Boq's life, Elphaba casts a spell that transforms him into the Tin Man, a man made completely of tin who no longer requires a heart. Boq's transformation causes him to blame Elphaba for his condition, leading him to join the hunt against her. This arc ties into the story of The Wizard of Oz, where Boq as the Tin Man becomes one of Dorothy's key companions in the quest against the Wicked Witch of the West.