The world shifts. Something is changed – for good or bad. The character reacts to this to either try to make things go back to how they were, or to make things better.
As in marking a character in stone. So, a face that shows character shows that which has been marked. Or deeply impressed.
The term didn’t come to mean a person in a story until the late 1660s – a good fifty years after Shakespeare had, as he put it, shuffled off this mortal coil.
All roads might lead to Rome, but you still have to find the road that works for you. There are many different ways to write and find your way through your story. But what works for someone else doesn't mean it's the way for you.