So we know that if Shouto uses his ice too much in a row, his right side starts to frost over – probably hinting at him getting frost-bite.

Then part of me started wondering what would happen if he used his fire too much – like would he start to melt or something? Get a fever?
But then I remembered Endeavor

and how he seems to always have his Fire Quirk on

Even when at home with family

As seen in the few flashback sequences we get.
So that begs the question: What is the limit – the bodily strain – of the Fire Quirk?




