Cedric Diggory

Cedric Diggory (aka Robert Pattinson and Edward Cullen) was a Tri-Wizard champion.

Goblet
Cedric Diggory is a Hogwarts' student who becomes a Tri-Wizard champion after being chosen to compete. He becomes very popular and is favoured over Harry Potter, the other Hogwarts' Tri-Wizard champion. Cedric competes in all three tasks, and completes them all.

However, at the end of the third task, Harry and Cedric are teleported to a graveyard where they are confronted by Wormtail and a strange, snakelike baby creature. Cedric fights alongside Harry against Death Eaters and the Dark Lord, but Lord Voldemort fires a Killing Curse at him, and it hits him just before he and Harry are teleported back to Hogwarts.

When Cedric is teleported back, he's dead, and is mourned by everyone.