Xiaopang's pet is a zombie dog. It used to be a lovely slug, but later it turned into a horrible monster. It is very tall and can walk upright. It is a creature from the opposite world, and its bad habit is to devour the human body. Demodex looks like a lizard, with no face and a big mouth full of fangs that can eat people. This is the external form of Demodog. And ended up killing the whole lab.