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Thenno and her sister Allie were mythological creatures known as gorgons. Hailing from ancient Greece, they had the power to turn human beings into stone by way of simple eye-contact. The sisters escaped from Greece shortly after the hero, Perseus, slew the gorgon famously known as Medusa (3).
As gorgons, the Grimms are immortal and they moved into the village of Collinsport in the territory of Maine some time in the 18th century ( 2). By the 20th century, the Grimm sisters established an art studio for themselves known as Asulon Studio. Situated not far away from the Collinwood estate, the studio became more familiarly known as Grimm House.
On December 26th, 1991, a troubled young man named Nathan Fairfax convinced Allie and Thenno to let him work for them as a handyman. Nathan, himself, is the benefactor of a strange ability – that of telepathy. Whenever he made physical contact with a subject, he became privy to their thoughts and memories (2).
One day while cleaning up Asulon Studio, Nathan noticed a stone pillar starting to topple towards Thenno. He leapt before it and pushed Thenno out of the way. Moments later, Nathan became aware of the sisters’ supernatural heritage (3).
- Thenno Grimm is an original character who was featured exclusively in the Dark Shadows comic book series. She never appeared in the television show.