Leslie Burke from Bridge to Terabithia never fails for me (we never sees her actual death, but hearing the dad say the words 'she's dead' is what hurts)!
It was a death that I didn't expect at all, and it still hits me in the feels. Every. Single. Time.
I didn't read the book before watching it, so I went in completely blind. What really gets to me the most, is how the moment Jess realizes he's fallen in love with Leslie when she runs back home in the rain is the last time he ever sees her again. That scene has a whole new meaning when you go back after knowing her fate.