For one, it's Fred Weasley. For another, he's mortal and a human. And thirdly because J.K. Rowling made Bellatrix kill him. She knew that some people needed to be killed during the battle of...
Augustus Rookwood detonated an explosion to kill 20-year-old Fred Weasley in the Battle of Hogwarts on May 2, 1998. George named his son "Fred" in his twin's honor.
George gets his ear cursed off at the start of the last book by Severus Snape. He was one of the 7 Harry Potters being transported that night to safety. Fred dies at the end of the same book at the...