Timeline of Deception: Every Duel and Trap Between Bellatrix and Harry Potter
Why didn't Bellatrix kill Harry Potter immediately at the Department of Mysteries?
Bellatrix was under strict, non-negotiable orders from Lord Voldemort: the prophecy could only be touched by those about whom it was made, and Voldemort insisted on killing the Boy Who Lived with his own hands. Her task was to intimidate, disarm, and capture Harry intact.
Did Harry's Cruciatus Curse permanently affect Bellatrix?
No. As Bellatrix explained during their duel in the Ministry atrium, righteous indignation does not sustain Unforgivable Curses. Her deep familiarity with dark magic allowed her to recover instantly from Harry's unfocused spell.
How did Harry manage to outwit Bellatrix during the Malfoy Manor interrogation?
Harry recognized her obsessive fear of Voldemort finding out about the Gringotts vault. By leveraging that terror, he persuaded Griphook to corroborate Hermione's cover story about the Sword of Gryffindor being a fake, buying crucial time for Dobby's intervention.