In this World, it's not just the old who are cunning; there is also the saying, "Though I am no human, you are truly a dog."
As a Soul Banner Master, Chimei's true body was naturally as frail as could be, so he had refined his own flesh, granting himself a defense comparable to a Monarch Rank Body Refiner.
From a biological standpoint, he had long ceased to be human.
Chapter 394