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~Cait Sith~
A majority of legends of the Cait Sith originate from Scotland, but that is not to say that is their only habitat, as the Cait Sith can possess any cat anywhere in the world.
Cait Sith originated from a failed summoning ritual of early western witches that resulted in them being bonded with their familiars. Because of this, all Cait Sith are female and may transform between their normal catlike state, and the form of a woman. Thought the number of times they can undergo this transformation is limited to eight times. After that the Cait Sith is stuck as a cat forever. This is the origin of the saying 'cats have nine lives'.
Since the Cait Sith are more venerable when they are in their human forms, they usually only leave the catlike forms when they have found what they believe to be a strong potential mate. After finding this mate they will assume their human forms in order to have children, and will not return to their catlike form until after they had given birth...
"Oh no..." Rin grumbled as he looked over from his demonology textbook to his bed were his Cait Sith familiar, Kuro, who he had always assumed was a boy, was tangled up in the blankets, looking to the world like a cheerful high school girl with short black hair that framed a smiling face with sharper than normal teeth and faint whisker like marks. Kuro's small yellow horns stook out through her black hair but looked more like a hair ornament rather than the real thing.
She had a fairly modest chest that was the halfway mark between Izumo's and Shiemi's and her long cat's tails was swinging back and further through the air as blushed underneath Rin's stare and her smooth peachy skin, slightly turning her bright green eyes away from him.
Oh, and they didn't have any clothes for him.
"Well Nii-san. As her tamer, you have to take responsibility." Yukio said patting his older brother on the shoulder.
"Wha..?" Was all Rin could say. The hidden son of Satan didn't know what else to say.
I've need done anything like this before. But after I read up a bit on Cait Sithes, I just thought it would be funny.
This will be the first time I will intentionally try for romance. Could also be the last time. Most of my normal readers already know I'm not very good at it.