Responses
You can find your answer in season 1 finale. There is a 4th Mugo that told Jaheon how to win glasses Mugo over.
Glasses Mugo doesn’t want to eat him. He wanted Jaheon to live but he also doesn’t want him staying with him.
What mkes me curious is that Glasses Mugo was the first one to actually prevent Jaehon being devoured. Remember he put a protective something on him on the early chapters. But now, monster and lord mugo both agreed to protect him, while glasses mugo seems to be the one against the idea and wants to devour the sacrifice.
Lord mugo also said that 2 of the mugos are in agreement, so glasses mugo is out of that. How and why? Why then did he put a protective charm for him in the beginning?