
Why is Beryl wearing the muzzle again??

Because he is a beast or smth, in one chapter from before we can see that he lost control and turned into beast mode or whatever it is and apparently that octopus doctor forgot his name made beryl or turned him into human because he is actually a monster, and he is first successful monster turned into human although he lost control not long ago

Kloff... they can never make me forgive you.

This story is about different worlds/alternate universes. The klopp you don’t want to forgive is the original klopp. The current arc you’re seeing in the largest chapters is the 2nd world with an entirely different klopp. He is not the same person as the original. The original goes to a different world.
The illustrator is the same, not the author.