Fthaggua is a fictional character from the Cthulhu Mythos. He was high priest of Cthugha and probably his servant. Like Knygathin Zhaum, there is some controversy on his status. He dwells on the planet of K'tynga and is regent of the Fire Vampires. His primary appearance is that of an unsteady orb of blue flame. A fictional character is any person who appears in a work of fiction. ... Cthulhu Cthulhu mythos is the label coined by the writer August Derleth for the shared world based upon the themes, characters, and story elements found in the works of H. P. Lovecraft, as well as his protegés and later writers influenced by him. ... In the fictional Cthulhu Mythos stories, Cthugha is a godlike alien being, one of the many Great Old Ones. ... Knygathin Zhaum was a Great Old One from the Cthulhu mythos, invented by Clark Ashton Smith. ... A regent is an acting governor. ...