I've been looking everywhere online for anyone who knows anything about this or has experienced it, but I haven't found anything. As a little kid, probably around five or six years old, I had several experiences with the same type of entity. I used to go to bed at my grandpa's old home because my Mom would occasionally drop me off on weekends. Around four times (possibly more), I'd very clearly see a small monkey of some sort swinging around the room as if it had branches to hold on to. I don't remember the appearance too well besides it being shadow-like with no facial features. It would never notice my presence, but every time I saw it I would sense that something was wrong in the room to the point where I'd have to sleep in the living room so I was on the opposite side of the house. I thought it could've been something hypnagogic, but I remember it was always happening while I was fully alert. If anyone has any information or references to anything I could look into, I'd highly appreciated it! I had a few different paranormal experiences as a small child, but only this one seems to have little to no online presence.