ariral? more like..
all air for-real

You finally found Waldo... err... I mean... The Insomnia Demon, which is what that 'shadow' is. He's quite a bit more transparent than the Ariral I had lurking in another scene in this same base.

Is it that shadow in the shower?

A portion was there already in the map, others I spawned in.

did you decorate it or was it like that

Nope.

In fact, I did consider putting something else out there but it wouldn't be as visible as the Wendigo is.

is it outside the windows as well or inside but in a shadow-y area?

I don't count anything literally in plain sight. There's two things lurking in this scene and the Wendigo is one of them.

yeah, the argemia plush and the Mann E. Quinn

That is the Wendigo lurking in the window there and it's not the only thing lurking in this scene.

As for the furry on the bed? Only reason why she's there instead of Dr. Kel is... well... not much reason other than it's the model I've been using in Gmod for about a month or so now.