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Phantasma

Phantasma is a phantom ghost who makes appearances in Scooby-Doo and the Ghoul School and OK K.O.! Let’s Be Heroes. She attends Miss Grimwood’s Finishing School for Ghouls. She has a playful, wacky personality, and can as a ghost, can become intangible and float through objects.

Professor Venomous

Professor Venomous (Steven Ogg) is an antagonist from the Cartoon Network animated superhero series OK K.O.! Let’s Be Heroes. He is the number one client for Lord Boxman and is served by the loyal Fink.