Bellatrix Lestrange is a major antagonist in the Harry Potter' continuity, she is a lethal death eater serving as one of Voldemorts most effective servants, participating in murders of that not only effected the stories previous to book 1 but even during the series continuation in killing an important character to the franchise and it's main character, negating a lot of efforts that the main cast had been focused in book 3. Bellatrix is also one of the most crual Harry Potter villains, torturing mugbloods through inflicting physical harm.
What makes her Pure Evil
- Murdering Nevilles parents
- Killing Sirius Black, which comepletly negated all the value Harry was trying to make in saving his family in book 3.
- Biting Hermiones arm painfully