Bellatrix is described as being taller than Harry, with thick, sleek, black hair, a thin mouth, dark, heavily lidded eyes, pale skin, and the Black family's patrician good looks and bearing.
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She was Voldemort's most trusted and loyal follower. She escaped the battle, running for the Atrium, with Harry in hot pursuit. The relationship, and the honour of bearing of his child, could have also been a reward to Bellatrix for her loyalty to him. What else did you take? Bellatrix was a natural leader and took charge in tricky situations, such as during the Battle of the Department of Mysteries and the Skirmish at Malfoy Manor.
She also showed affection for her nephew Draco Malfoy , teaching him Occlumency and possibly other skills. Albus Dumbledore knew Bellatrix to be a highly dangerous Death Eater since the First Wizarding War , having also witnessed her trial and imprisonment, after she tortured the Aurors Frank and Alice Longbottom to insanity and beyond.