Scary Teri is a demonic female ghost who haunts mirrors.
When Cyborg was very young, he attended a slumber party and was forced to participate in a game of Scary Teri. According to him, the demonic ghost appeared yet he somehow managed to get away. However, the experience had a traumatic effect on Cyborg, and he remained afraid of the things that could be lurking in the dark. Years later, the Teen Titans believed Cyborg's fear to be irrational and forced him to participate in the game once more. However, Scary Teri turned out to be very true.
Hence her name, Scary Teri is indeed scary, due to her appearance and her deep rough voice. She can only be summoned by saying her name three times in front of a mirror. To defeat her, a person must say "Scary Teri isn't scary" three times while facing a mirror in front of her.
Scary Teri has long white hair, violet skin, elf ears, and yellow eyes. She wears a torn turquoise dress.
Shapeshifting: Scary Teri is able to transform into supposedly scary things like a Snake or Bat.