* Severus Snape: Snape was killed by Severus Snape (yes, himself!). He was mortally wounded by the curse of Nagini, Lord Voldemort's snake, but it was a planned sacrifice to protect Harry. He ultimately died a hero, having fulfilled a crucial role in the prophecy that would lead to Voldemort's demise.
* Fred Weasley: Fred was tragically killed in the Battle of Hogwarts by Death Eaters. He died while fighting bravely alongside his brother George and the Order of the Phoenix.
* Dobby: Dobby was murdered by Bellatrix Lestrange, who, in a fit of rage, stabbed him with a knife. Dobby, in a heroic act of self-sacrifice, had saved Harry Potter by luring him away from Malfoy Manor, putting himself in harm's way.
* Remus Lupin: Remus was killed in the Battle of Hogwarts by Antonin Dolohov. He died bravely fighting alongside Harry Potter and the Order of the Phoenix.
* Nymphadora Tonks: Tonks was killed in the Battle of Hogwarts by Bellatrix Lestrange. She was killed defending her husband, Remus Lupin, and protecting Harry Potter.
* Alastor "Mad-Eye" Moody: Moody was killed by Barty Crouch Jr. (impersonating him) in the Triwizard Tournament. Crouch Jr. tricked Moody into believing that Harry Potter was the true owner of the Triwizard Cup, leading him to be transported to the graveyard where he was eventually murdered.
* Colin Creevey: Colin was killed in the Battle of Hogwarts by Death Eaters. He was a brave young wizard who died fighting for his friends and the wizarding world.
It's important to note that death is a prevalent theme in the Harry Potter series, and each of these characters met their end in different ways, often highlighting the themes of sacrifice, bravery, and the power of love in the face of adversity.