Name: Hastur
Titles:
The King in Yellow, The Unspeakable One
Gender: Male
Age: Irrelevant
Species: Great Old One
Abilities: Can manipulate, see through and move through time to a limited degree.
Place of Origin: Hastur comes from the end of all things, the edge of the universe.
Physical appearance:
From a distance, Hastur would simply appear to be a rather tall man in a gaudy robe. But once you get closer the inhuman aspects become more and more clear. His lack of arms can be shrugged off with the idea that they're just underneath the Yellow robe. The completely unmoving body will likely unnerve many. The thick limbs waving to and fro that come into view will likely be the point that most understand the truth, this creature is most certainly not human.
Allegiance: Yog Sothoth
Personality: A calm and collected being of great intellect and power. A scholar beyond all and well spoken being. This all disappears when he visits the school. He suddenly gains an undeniable urge to grab the nearest human females and fill their various orifices with his long limbs. He keeps all of his abilities with manipulation and can focus himself well enough to make the urge enjoyable to work with instead of picking up every human he comes across.
Strengths: Hastur is an eternally ancient being who has seen countless civilisations rise and fall (and caused some of them to rise and fall) time and again. He has learned much from each dead race and every destroyed species. Due to his Master's nature, Hastur may interact physically with normally intangible objects or beings.
Weakness: Hastur is highly arrogant and sure of himself. Although extremely difficult to stop he can be beaten with the correct objects and correct rituals. Beyond this if a fight goes on for so long that it becomes boring, Hastur will declare his opponent the winner and find something else to do.
tragic really. I can write perfectly adequately but I've always found that just putting myself out there to be challenging. 
