Put the title of the show, movie, game or book whatever above the character and use spoiler tags please. For me it's probably:
Buffy the Vampire Slayer
Buffy the Vampire Slayer
Tara's death, every time I watch it I desperately hope it doesn't happen this time, but then when it does right after she gets back together with Willow it's just completely heartbreaking, the way it happens, how sudden it is, how unfair and unexpected it is, just like it happens in real life I suppose.