In the first generation of the show (which was the one between 1998 and 2005, different in the recent generation from 2016), she disguised as The Professor's new love interest, and ground the Powerpuff Girls so she can steal the mayor's jewels.
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Jamie Murphy
Cree - Codename: Kids Next Door
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Jamie Murphy
7 years ago Report
She's the elder daughter of Abigail (AKA Numbuh 5), plus Hoagie (AKA Numbuh 2) has a secret crush on her.