Which sentence in this excerpt from Hans Christian Andersen’s “The Snow Queen” contains direct characterization?

Now then, let us begin. When we are at the end of the story, we shall know more than we know now: but to begin.

Once upon a time there was a wicked sprite, indeed he was the most mischievous of all sprites. One day he was in a very good humor, for he had made a mirror with the power of causing all that was good and beautiful when it was reflected therein, to look poor and mean; but that which was good-for-nothing and looked ugly was shown magnified and increased in ugliness. In this mirror the most beautiful landscapes looked like boiled spinach, and the best persons were turned into frights, or appeared to stand on their heads; their faces were so distorted that they were not to be recognised; and if anyone had a mole, you might be sure that it would be magnified and spread over both nose and mouth.

"That's glorious fun!" said the sprite. If a good thought passed through a man's mind, then a grin was seen in the mirror, and the sprite laughed heartily at his clever discovery. All the little sprites who went to his school—for he kept a sprite school—told each other that a miracle had happened; and that now only, as they thought, it would be possible to see how the world really looked. They ran about with the mirror; and at last there was not a land or a person who was not represented distorted in the mirror. So then they thought they would fly up to the sky, and have a joke there.