Scarecrow

The Scarecrow is the primary antagonist of OZombies  who was featured in the original story. Similar to the original story, the Scarecrow wishes to have brains; but not for the same reason.

The Wonderful Wizard of Oz
In Baum's classic 1900 novel The Wonderful Wizard of Oz, the living scarecrow encounters Dorothy Gale in a field in the Munchkin Country while she is on her way to the Emerald City. He tells her about his creation and of how he at first scared away the crows, before an older one realised he was a straw man, causing the other crows to start eating the corn. The old crow then told the Scarecrow of the importance of brains. The "mindless" Scarecrow joins Dorothy in the hope that The Wizard will give him a brain. They are later joined by the Tin Woodman and the Cowardly Lion. When the group goes to the West, he kills the Witch's crows by twisting their necks. He is taken apart by the Flying Monkeys and his clothes thrown up a tree, but when his clothes are filled with straw he is back again.

After Dorothy and her friends have completed their mission to kill the Wicked Witch of the West, the Wizard gives the Scarecrow brains (made out of bran, pins and needles – in reality a placebo, as he has been the most intelligent of the travelers all along). Before he leaves Oz in a balloon, the Wizard appoints the Scarecrow to rule the Emerald City in his stead. He accompanies Dorothy and the others to the palace of the Good Witch of the South Glinda, and she uses the Golden Cap to summon the Winged Monkeys, who take the Scarecrow back to the Emerald City.

His desire for a brain notably contrasts with the Tin Woodman's desire for a heart, reflecting a common debate between the relative importance of the mind and the emotions. Indeed, both believe they have neither. This occasions philosophical debate between the two friends as to why their own choices are superior; neither convinces the other, and Dorothy, listening, is unable to decide which one is right. Symbolically, because they remain with Dorothy throughout her quest, she is provided with both and need not select.