They're reading the guidebook from the Volume 3 Blu-ray.
Let's see... Friends' body parts are mostly the same as humans.Their ears, tail, and clothes are made of a material called "Kemono Plasm"...Kaban,Hoh. This is very interesting.TriviaO-Okay.It should definitely have something important written in it.
Read it aloud.We found a book that has the figure of a Friend drawn in it.While they can't change into a human, they can still make the inhuman parts disappear if their thoughts are strong enough.Kemono plasm