Eleanor Marshall is The Marshalls' 2-year-old daughter. She has an older sister named Nina Marshall.

Eleanor is described as having blonde, wavy hair with a big cowlick and gigantic blue eyes. She likes copying Nina and playing hide & seek with her. She used to get ear infections & took eardrops for them, but now that she's two years old, she's past them.

In Book #45, Eleanor was in the Stoneybrook Baby Parade on the BSC's float.

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