Leslie Burke, The Bridge to Terabithia
Bridge to Terabithia is one of the saddest movies you'll ever see. One minute, you're watching in awe as you relive your childhood fantasies with the characters onscreen. The next minute, you're sobbing your eyes out about the terrible outcome of the characters that you relate with so deeply.
Hedwig, Harry Potter & the Deathly Hallows- Part 1
There are few owls in media that evoke the same emotional response that Hedwig does. When Hedwig died in Harry Potter & the Deathly Hallows- Part 1, not very many people held onto the movies. Seriously, there's a whole subreddit dedicated to people who gave up on Harry Potter when Hedwig died.