The Chronicles of Narnia: The Voyage of the Dawn Treader
Eustace: a whiny, insufferable, and selfish boy that grates your nerves until they are unbearably raw; can't see past his own needs and wants, and of course never lifts a finger to help because, of course, he has it the worst.
You know the type.
We readers have to put up with him and his horribleness for the first 5 chapters. Then, in chapter 6, he is fittingly turned into a dragon: "huge bat-like wings, saw-edged ridge on his back, and cruel, curved claws." A terrible beastly thing. Very much an outward representation of what one might assume the inner Eustace would look like, if thrown-up inside out.
And then, Dragon-Eustace cries. Loneliness has reached even his heart. He yearns to be with humans again. He realizes he has been quite dreadful. He flies to find the others.
The others quickly find out that this dragon is actually Eustace; and all the better. Dragon-Eustace is helpful, kind, thoughtful. But he is a dragon. He knows, and feels that he is not like everyone else anymore. He is even scared to look at his own reflection. He feels the burden that he has put on others for being a dragon.
On one especially horrible night, as the dragon is pained with heavy thoughts and heavy heart, Aslan comes. Together, they walk up a mountain. At the top is a well, a very large well. So large a dragon could lay and swim in it. Knowing instinctively that the water would heal him, Aslan tells him he must undress first. Undress? the dragon says to himself. But, I have no clothes on, he thinks, looking down at his dragon body. And then Eustace remembers dragons are like snakes, and he realizes this is what Aslan meant, to shed his skin. He scratches and peels, and after a few minutes, he steps out of an old and nasty former skin. Feeling much better, he goes to step into the water. Only, his feet are rough, and wrinkled, and scaly just as they had been before. He peels again, and again, but gets the same results. Even though he feels better with each shedding, he looks down and it's the same skin he started with.
" 'You will have to let me undress you,' [says Aslan]. I was afraid of his claws . . . but I was pretty nearly desperate . . . So I just lay flat down . . . and let him do it.
The first tear he made was so deep that I thought it had gone right to my heart. And when he began pulling the skin off, it hurt worse than anything I've ever felt. The only thing that made me able to bear it was just the pleasure of feeling the stuff peel off . . . Well, he peeled the beastly stuff right off - just as I though I'd done it myself the other three times, only they hadn't hurt - and there it was lying on the grass: only ever so much thicker, and darker, and more knobbly-looking than the others had been. And there was I as smooth and soft . . . and smaller than I had been . . . I was very tender underneath now that I'd no skin on . . ."