Harry Potter and the Order of the Pheonix ('kills Sirius Black at the department of mysteries)
Harry Potter and the half blood Prince: In this series, in the beginning she appears to negotiate with Snape about protecting Draco and as she places the unforgivable spell on him which he ends up killing Dumbledore at the astronomy tower which was planed between them years ago.
Harry Potter and the deathly Hallows pt 1: In this series she appears to be in a fight at the malfoy manor torturing Hermione Granger as the other death eaters fight of Harry and his friends.
Harry Potter and the deathly Hallows pt 2: In this series (last apperance) she fought Molly Weasly but failed as she was defeated by Molly in the battle of Hogwarts.
Bellatrix Lestrange was a Death Eater and aunt to Nymphadora Tonks and Draco Malfoy. She was married to Rudolphus Lestrange. She participated in the torture of Alice and and Frank Longbottom and was imprisoned in Azkaban until 1996. That year she participates in the battle at the Ministry of Magic, during which she murders her cousin, Sirius Black, Harry Potter's godfather. She taunted both Neville Longbottom and Harry Potter, over the torture of Neville's parents and death of Harry's godfather. In the film version of, Harry Potter and the Deathly Hallows, Bellatrix questions Hermione Granger before torturing her while carving the wretched word, Mudblood, on Hermione's arm with a dagger, later threatening to kill her with the dagger at Hermione's throat. Afterward, while Harry, Hermione, Ron, and other captured friends attempt to escape from the Malfoy's home with Dobby, a House Elf, she throws the dagger as they Apparate with Dobby-but to Harry's ultimate horror, the dagger hits Dobby's chest, killing him. She is killed by Molly Weasley during the Battle of Hogwarts. Bellatrix, before her death, took part in the death of many people. She was the sister of Narcissa Black and and Andromeda Tonks. Though Narcissa married a pure-blood and became a follower of Lord Voldemort, Andromeda married a Muggle and had a daughter named Nymphandora, preferrably Tonks. During the battle of Hogwarts, Bellatrix killed her niece Tonks. Bellatrix was described as beautiful, with a heavy jaw and dark, heavily-lidded eyes.