Only Friend can climb walls, and it can be scary.

So the scenario is that they are in the SCP Facility, where it captures and experiments on paranormal entities and objects, and they somehow captured Only Friend.

Well, she could easily break containment because of her shadow jump, and climb within the vents and walls.

I am imagining the containment breach scenario, where an MTF (the people with guns there) walks in with a flashlight...

And sees this.

And considering Narghouls hate sudden lights, that guy won't be able to run for a while.