Sidekick Skinny The definition of a sidekick is a close companion, partner, or friend. In the book, Uglies by Scott Westerfield, Shay/Skinny is Tally’s sidekick and best friend. Tally is the protagonist in the story and her archetype is Shay, Shay is Tally’s sidekick and best friend. Shay both positively and negatively impacts Tally, Shay teaches Tally how to adventure and take risks, but this also causes Tally to betray and lose lots of people’s trust. Although, one reader may conclude that Shay impacted Tally mostly positively because of how much Tally grew throughout the story. Shay is an adventurous and rebellious girl who teaches Tally many things about the pretty operation and the outside world. They have some pretty crazy adventures