https://twitter.com/EEMPDFXUOn0xHuc/status/1229695114668212224
A reader guesses that those are bug-like creatures that feed on light, and on whoever tries to turn it off. When they are full, they expel that light back. The author confirms.

As for the doors, they don't know, neither do I, and the author says nothing.

Also, in the Pixiv version, "dark corridor" picture has open doors too.

Interesting... So I guess when they are full they will not attack anyone.

But the 2nd panel has open doors...

i'm guessing they are also in different dimensions? they don't really see each other and their physical interaction doesn't change each other so Arai san will always be on in her perspective

Like how the doors aren't open but is on the other perspective

Didn't common raccoon get eaten in the first part? So who or what is this one?

EndingNoZero said:

Didn't common raccoon get eaten in the first part? So who or what is this one?

No, that was someone else, Raccoon just went back to the elevator.

I see, thank for the explain, almost make me think that raccoon is an anomaly herself too.

EndingNoZero said:

I see, thank for the explain, almost make me think that raccoon is an anomaly herself too.

I mean, when you get down to it, Friends and Ceruleans are anomalous. Just a partially understood anomaly.

Garrus said:

I mean, when you get down to it, Friends and Ceruleans are anomalous. Just a partially understood anomaly.

But in this case, Raccoon is relatively more anomalous. An anomaly of an anomaly.

Or maybe she just has a really high luck stat.

Mettan said:

But in this case, Raccoon is relatively more anomalous. An anomaly of an anomaly.

Or maybe she just has a really high luck stat.

Yet the things here deal them like normal people.