The Scarecrow is a sentient figure crafted from straw, dressed in faded blue Munchkin clothing complete with a pointed hat, an old leather belt, and scuffed boots. His head is a stuffed sack featuring painted facial details: blue eyes of uneven size with button pupils, a nose, a mouth, and ears, creating a distinctive, rustic look. Lightweight and prone to awkward movements due to his straw-stuffed form, he feels no physical pain and requires neither sustenance nor sleep. Fire remains his primary vulnerability, posing a significant threat to his flammable body.

Originally positioned in a Munchkin Country cornfield, the Scarecrow gained sentience through unexplained magic. He was merely two days old when Dorothy Gale found him. A crow's mockery about his lack of brains instilled profound insecurity, driving his quest to seek wisdom from the Wizard of Oz. Despite this self-doubt, he displayed inherent intelligence early on, devising solutions like building bridges over ditches, constructing rafts to cross rivers, and orchestrating the Cowardly Lion's rescue from a poppy field using field mice.

Joining Dorothy’s journey, he proved resourceful and loyal. He strategized against threats like the Kalidahs and suggested seeking Glinda’s help after the Wizard’s departure. His cleverness showed when he directed winged monkeys to carry Dorothy across a gorge, though monkeys later disassembled him under the Wicked Witch’s command. Reassembled by friends, he helped infiltrate the Witch’s castle and participated in her defeat.

The Wizard provided him a placebo "brain" of bran, needles, and pins, boosting his confidence. This validation helped him recognize his innate wisdom, though his core personality—kind, gentle, and empathetic—remained unchanged. After the Wizard left Oz, he ruled the Emerald City wisely until deposed by General Jinjur’s rebellion. He later aided in restoring Princess Ozma to the throne and became one of her trusted advisors.

In later adventures, he retired to a corn-shaped mansion in the Winkie Country but stayed active in Oz’s affairs. He rescued visitors like Cap’n Bill and Trot in Jinxland, accompanied the Tin Woodman to find Nimmie Amee, and joined diplomatic missions, such as freeing the Royal Family of Ev from the Nome King. He also developed romantic feelings for Scraps, the Patchwork Girl, bonding over their non-human identities.

Symbolically, his narrative explores self-actualization and the contrast between intellect and emotion, highlighted through friendly debates with the Tin Woodman. His evolution from an insecure figure to a respected leader underscores themes of hidden potential and the placebo effect of confidence.