Sari Papadakis is the 2-year-old daughter and the youngest child of the Papadakis family. She has an older brother named Linny and an older sister named Hannie. She lives on McLelland Road across the street from the Brewer family.

Sari has dark hair, deep brown eyes, olive skin, and a terrific smile. In Book 33, Sari plays "Ring Around the Rosie" with Emily Michelle Brewer, but Sari seems to understand the game better than Emily. In Book 45, Sari played with Kristy's egg child. She had a foster sister named Lou McNally.

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