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She is based on Chrissy Thompson from Mister Roger's Neighborhood.
During one of the interstitials she introduces her female horse Peaches, explaining her name refers to her soft fur. Chrissie is able to ride Peaches but needs some assistance to climb aboard her back.
What she looks like
Chrissie has fair skin. Her long, dark brown waist-length slightly-curled hair is seen tied up in a higher ponytail attached with a pink headband to match the style. She also wears an aqua-green school dress with white and lighter pink details added to it, and pink-strapped sandals.
Chrissie wears metal braces around her legs to help stabilize her for standing. She also sometimes uses forearm crutches to help move around, but is able to stand stationary without them.