Nightgaunts (also Night-Gaunt) are a group of creatures that chase Mahiro which can be seen in the first episode. They are the fictional race in the Cthulhu Mythos and is also part of H. P. Lovecraft's Dream Cycle. These creatures appear in the poem "Night-Gaunts" and the novel: The Dream-Quest of Unknown Kadath, which are both by Lovecraft. Nightgaunts were inspired by Lovecraft's childhood nightmares. Nightgaunt
The first Nightgaunt that Mahiro encountered. They are, "shocking and uncouth black beings with smooth, oily, whale-like surfaces, unpleasant horns that curved inward toward each other, bat-wings whose beating made no sound, ugly prehensile paws, and barbed tails that lashed needlessly and disquietingly. And worst of all, they never spoke or laughed, and never smiled because they had no faces at all to smile with, but only a suggestive blankness where a face ought to be."