This is based on opinion. Please don't list it on a work's trope example list.
Tear Jerker / Wintersmith
Rob Anybody reads Where's My Cow? to his children. The idea of Where's My Cow? as a metaphor for going to extremes to be a good father...
The part where the townspeople are still asking Miss Treason for help even after she's dead made me cry a little, as well as this:
And just as she was about to speak sharply to the villagers for still bothering Miss Treason, she remembered the packets of Jolly Sailor tobacco that the shepherds even now left on the turf where the old shepherding hut had been. They didn't write their petitions down, but they were there, all the same, floating in the air: Granny Aching, who herds the clouds in the blue sky, please watch my sheep. Granny Aching, cure my son. Granny Aching, find my lambs.
Tiffany, in the final confrontation with the Wintersmith, realizes that he does thinks like a human. "He thinks like a human who's never met another human. He's cackling. He's so mad he will never, ever understand how mad he is, he doesn't know what horrors he's planning, and he's so happy he's almost sweet ..."
She'd cry, later, for the Wintersmith who wanted to be human.
In the opening scene, Tiffany's fear for the lambs that are dying under the snowdrifts, as exhausted men labor to move snow they have nowhere to put. Her father, begging her to do something beyond her powers to fix a disaster she knows is all her fault. And then he tells her that her little brother is missing...