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Missy Gunderson was a student at William McKinley High School who made her debut in Prom-asaurus.
She was portrayed by Katie Valenti. Full maiden name Katherine Fussell.
She is first seen as a nominee for Prom Queen in Prom-asaurus. When she was nominated for prom queen, she was very happy and the rest of the class cheered her on, which shows that she might have been popular among her peers. However, she lost the crown to Rachel Berry.