Melissa "Missy" Cooper (played by Raegan Revord) is the fraternal twin sister of Sheldon Cooper on the TV series Young Sheldon.  The polar opposite of her twin brother, Missy is utterly disinterested in schoolwork and often feels jealous of her brother and the attention he receives from their mother Mary.  Missy's style varies throughout the series, but often lingers on the more tomboy-ish side of things, especially when she discovers she has a talent for baseball.  She also often dons overalls, especially in her younger days, if you find yourself more in the mood for shorts than a pinafore dress.

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