What is Bellatrix Lestrange’s Patronus?

If Voldemort were the strongest snake in the patronus list – the largest, most dangerous King Cobra, then it would be fitting for Bellatrix's patronus to also be a Snake of medium size, also venomous and still extremely dangerous. Hence, the Black Mamba Snake Patronus.

How is Bellatrix described in the books?

Bellatrix was described as a tall woman with long, thick, shining black hair. She had thin lips, dark, heavy-lidded eyes, and a strong jaw. She had the classic 'great good looks' and arrogant bearing common for members of the House of Black, but like her cousin Sirius, time in Azkaban took a toll on her appearance.

What is Bellatrix’s Boggart?

Bellatrix's boggart would be Lord Voldemort, with an expression of disgust and dissapointment in his face, turning away from her.

How did Bellatrix get pregnant?

Obvious spoiler warning! Yep, that happened: Bellatrix and Voldemort had sex sometime around Order of the Phoenix or Half-Blood Prince, and their wild night in bed led to a child named Delphi Diggory/Riddle/Lestrange. According to Delphi herself, she was born sometime before the Battle of Hogwarts.

Is Bellatrix related to Leta?

Bellatrix married into the Lestrange family, originally being born as Bellatrix Black, meaning she and Leta are not related by blood.