Penny the Platypus is Perry the Platypus's female counterpart in "The Attack of the Counterparts", who is also an agent from a parallel universe. She was intended to be Perry the Platypus's sweetheart by Heinz Doofenshmirtz, but she just became friends with him, and helped Perry defeat Doof before returning to her own universe with . This article is a . You can help My English Wiki by expanding it.