Purpk

"Shut your guacamole!"

- Mr. Purpk

Purpk is the blue-skinned doppelgänger of Benjamin Krupp. He only appears in "The Disturbing Dilemma of the Dysfunctional Doppelgangers."

Personality
He is kind, patient, and loving towards the kids, or so it seems like. In reality, he is actually scared of the kids and acts as if there was no problem for every adult.

The Epic Tales of Captain Underpants in Space!
Despite George, Harold, and Livmen's apparent success in liberating the adults and putting them in charge, the Utopiqua Kids still enslave adults. The heroes' failure is revealed at the end of the episode, where Purpk, along with other Utopiqua Adults, is seen imprisoned in a spacecraft operated by the Utopiqua Kids.

Trivia

 * He could possibly be a reference to Nice Benjamin Krupp.