A [[creature]] that appears in the [[sewer|Sewers]]. It is composed of a very dark blue mass with a grey face and [[black eyes]] that have [[red pupils]]. 

It is found off to the side of the map before Big Red's room.

"Yume Nikki Wiki":[https://yumenikki.fandom.com/wiki/Alley_Demon]
alley demon (yume nikki)