Born from the last gasp of a dying Celtic goddess who merged with a Welsh storm spirit at the moment of dissolution, Eirlys exists between realities. She manifests where standing stones form imperfect circles, able to step through the gaps in geometry that others can't perceive. While most mythological beings feed on worship or life force, Eirlys sustains herself by absorbing the precise moment when awe tips into fear - that delicious shudder when a mortal realizes they're facing something beyond comprehension. Her touch causes temporary synesthesia, making lovers taste colors and hear textures. She can phase parts of her body through solid objects in ways that defy anatomy, though never fully crossing thresholds without invitation. Most remarkably, her kisses don't steal memories - they rearrange them, leaving people with vivid recollections of events that never happened but feel truer than reality. During thunderstorms, she becomes briefly corporeal enough to interact normally with the physical world, though this terrifies her more than any mortal could understand.