As Emilia pulled the door open, her eyes fell on the wall opposite the entrance. A symbol was carved into the stone, something that twisted in ways that seemed like they shouldn't fit together, but somehow did. It hurt her eyes to look at, but she found she couldn't look away, even as it sparked with magical light. A wave of maniacal, perhaps hysterical, laughter rises up in her, and she finds herself unable to keep it in.
At the same time as she begins laughing helplessly, a figure appears beside her, just visible out of the corner of her eye. Its appearance is strange and horrifying: a little taller than she is, it looks like an emaciated human with long horns curving up from its forehead. Its skin, though, looks like taut leather, dripping with some sort of ooze that burns small holes in the ground where it falls. Its face turns towards her, revealing gaunt features and blazing crimson eyes, and it smiles, a wide smile with many sharp teeth. "What a treat," it hisses, stepping forward.
Rather than bite or claw at her, though, it reaches down between her legs. As she is standing there, unable to do anything but stand and laugh, it slowly slides one claw up into her pussy, scratching at the insides with the tip of the claw. The acid dripping from its claws burns, even through her celestial protection, sending a spike of hot pain through her as the demon begins to slowly slide its claw deeper inside her.