Hermione later disguised herself as Bellatrix to get into her vault in Gringotts, which was guarded by a dragon; Bellatrix never knew of this. It is presumed that, in Harry Potter and the Deathly Hallows Part 2, Bellatrix was the one who killed Tonks as in the book, since Tonks's death is never shown on-screen.n Harry Potter and the Order of the Phoenix, Bellatrix was broken out of Azkaban by Voldemort and some of his Death Eaters, along with Antonin Dolohov and many other Death Eaters.
Additional Causes. Migraine attacks may cause vertigo that can last a few minutes or a few days. Stress, food allergies and hormonal changes can cause migraine-related vertigo. Less likely causes of vertigo may involve neurological problems, including brain hemorrhage, stroke or multiple sclerosis.
The most common cause of peripheral vertigo has been termed acute labyrinthitis or vestibular neuronitis. While there may be subtle distinctions between these conditions, the presumed etiology is inflammation. In this condition the vertigo comes on quickly and patients often have severe nausea and can't walk.