My characters didn't change much since the beginning of my series (at least not when it comes to art), as I tried to keep the same artstyle and designs. And in the story only about 2-3 weeks passed, so it wouldn't make sense.
Except for my main, who can't sleep and get a dark circles under her eyes, darker with each chapter.
I managed to find panel with a very similar pose : D
What really changed is my characters' designs from when I first wanted to draw the story, and how they ended up looking at the end. Some characters are unrecognizable- but mostly because I merged two stories and characters there into one