Madam Bellatrix Lestrange (née Black) (c. 1951 – 2 May, 1998) was a pure-blood witch, the daughter of Cygnus III and Druella Black and elder sister of Andromeda Tonks and Narcissa Malfoy. She started her education at Hogwarts in 1962 and was Sorted into Slytherin house. After graduating from Hogwarts, she became a Death Eater, fanatically loyal to Lord Voldemort. She was one of the few known females in the group, as well as among the most dangerous and sadistic of Voldemort's followers. While Bellatrix and Narcissa married pure-blood wizards, Andromeda married Ted Tonks and was disowned by the family. Andromeda was burned off the Black Family Tree and they were forbidden to talk about her. At the end of the First Wizarding War; Bellatrix, Rodolphus Lestrange (husband), Rabastan Lestrange (brother-in-law), and Barty Crouch Jr. took part in the torture of Aurors Frank and Alice Longbottom to the point of driving them insane, while searching for information on Lord Voldemort after his first downfall.

She participated in several battles of the Second Wizarding War, making it a particular goal to murder any relatives who were members of the Order of the Phoenix, including her cousin Sirius Black III and niece Nymphadora Tonks. She also murdered the Malfoy family's former house-elf, Dobby, who had become a firm ally of Harry Potter, with her knife. During the final battle, she was the last Death Eater standing, apart from Voldemort, but was eventually killed in a duel by Molly Weasley.