The messenger of the celestial world, a being that was always seen instead of the Ancient Ones, was a frightening figure to the celestials. The fact that he could show his real form in the celestial space while the others couldn't, was enough to show everyone that he was different from them.
At the same time, due to him being the only one that was seen, if Mundus ever was the one to meet you, or give an order himself, it was pretty much taken as if the Ancient Ones were the one doing the talking.
However, due to this, no one really saw Mundus act, which begged a lot of them to ask the question, after some time had passed, was Mundus actually a strong celestial?
Immortui wasn't the only celestial to act out, or attempt to go against the Ancient Ones' set up of things. There were those that were simply just kicked out of the celestial space like Quinn.
