New to the anime, just started the mugen train arc. Something I was wondering, some of the demons are pretty bizarre looking. Is that a conscious choice they made in order to evolve into that form? So far I've seen that Rui could change the appearances of demons to look more like himself, and that Kibutsuji could change his appearance and even gender, so it's established that at least some of them can pretty much have control over the molecular structure of demon bodies. Is that a power that just those two have or do all demons kind of change into how they wish to appear after eating enough people? Like for instance, did the hand demon choose to become a writhing mass of arms and hands or was that just something that just unconsciously happened because his subconscious remembered how he liked having his hand held as a kid?