Nightmare Demon

At Tuti's art display Gabe describes a hooded, strange figure with a complete shadowy face SWE3·00:59:47. The figure says "I will contact you tomorrow. Put this sticker on it, please." SWE3·01:00:00. It asks "What is Venmo?" and pays with a check signed "Nightmare Demon" SWE3·01:00:09 SWE3·01:00:23.

The Nightmare Demon is the shadowy figure who buys one of Tuti's photos with a check signed Nightmare Demon SWE3·00:59:47 SWE3·01:00:23. Its profile card calls it a "devourer of dreams" SWE3·00:59:55. The mirror later says a different visitor was just smoke and shadow, not someone wearing clothes SWE3·01:26:14 SWE3·01:26:20. In the finale Tuti tells the vice dean the shadowy figure said Nightmare Monster, and he says "Nightmare is fine"; he explains that it consumes the dreams of other people and gives them misery, and sets it apart from the living shadow SWE4·00:44:56 SWE4·00:44:59 SWE4·00:45:05 SWE4·00:45:08.