Robbie Shapiro has a sister, but she makes no appearances in the series and is only mentioned. On TheSlap, while Robbie was singing Broken Glass, a caption appeared on the bottom, saying "Robbie is wearing his sister's pants," confirming that Robbie has a sister. She was mentioned in Cell Block when Robbie shows a picture of him wearing his sister's shirt. In Tori Fixes Beck and Jade, it is revealed that she collects rare butterflies, as Robbie helps take care of one of them while she is at cheerleading camp.

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