If I recall correctly it is mentioned a few times that the master has control over Asterion in such a way that allows them to change his appearance at will. The purpose of this was to originally allow the master to better torture Asterion.
My question is, why couldn't MC have immediately and fully healed Asterion when MC first met him? Even without the wine, could the MC have simply willed it into existence as an extension of MC's desire to alter Asterion's form and body? We know that later MC can change Asterion's color to white, as that was his original fur color, wouldn't this be much the same, as removing limbs or something else, just in reverse? At some point the masters would have had to be able to will Asterion to 'normal' in order to switch to a new torture.
I'm just curious if I'm missing something or if this is just a small plot hole. Honestly, it's so minor it doesn't really matter, I just had to put this out there since it popped into my head earlier today.