Hildy Gloom is the antagonist of the 7D and the partner of Grim Gloom.
Hildy is an evil witch who wants to destroy Crossovia when she was still around.
- She kidnapped Dee Dee by sending her to the dark dimension in the episode, Cyro and the 7D
- She kidnapped Cyro by trapping her into a cage so she will turn her into a ghost in the episode, My Crush, Penn Zero
- She kidnapped Wendy the Good Little Witch by grabbing her into the arms in the episode, The Friendly Witch and the Not-So-Friendly Witch
- She kidnapped Penn Zero by trapping him into a cage in the episode, Penn Animal
- She kidnapped Alyson Levinson into thinking that she was a coward in the episode, Esther the Ghost
- She kidnapped Pacifica Northwest along with Mandark in the episode, New Girl on the Blocks
- She tied up Jinx into a chair in the episode, Hex, Lies and Jinx
- "Glad you could make it."
- "So, Alyson, are you the coward who is a phasmophobe?"
- "Okay, so, you're the phasmophobe. I kept you in hostage because you are still afraid of ghosts."
- "If you don't believe in ghosts, I'm serious!"
- "It's not fair! I want the little angel, Alyson!"
- "Okay, Rippen! I want this plan to be completed!"
- "Hello, Glad I caught you, Penn the Cheetah!"
- "My plan is to keep Alyson in hostage for being a coward, like Courage is!"
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