Lord Voldemort may have been the ultimate villain of the "Harry Potter" series, but Bellatrix Lestrange was evil, sadistic, and worst of all, always striving for the Dark Lord's love and respect.
After graduating from Hogwarts, Bellatrix became a Death Eater. She was fanatically loyal to Lord Voldemort and was among the most dangerous and sadistic of his followers. All the Black sisters married pure-blood wizards, except for Andromeda who married Muggle-born Ted Tonks and was disowned by the family.
She was always mentally unstable probably due to her upbringing; however, azkaban made her even worse. Proof of her craziness can be seen in her obsession with finding the dark lord and torturing 2 aurors to insanity in her pursuit.
Her evil nature was a direct result of her love for the most vicious wizard in the history of the Wizarding World. Bellatrix was a powerful wizard. She was trained by the Dark Lord himself. Therefore, she had exposure to all things evil and she delved into it wholeheartedly to please her Lord.
Bellatrix ended up in Azkaban because she took part of the torturing of Frank and Alice Longbottom, so she became crazy in there.
He did not love anyone, and did not care to be loved. He felt nothing for his family, and only wanted his friends in school to rally around him because he wanted to hold power over them. Bellatrix Lestrange was obviously in love with him and worshiped him, but he only cared for her servitude, not her.
She was remorseless and was cackling in glee after she had murdered Sirius. Bellatrix couldn't stop raving about it and showed it by singing “I killed Sirius Black” multiple times.
Harry tried to use this spell himself. The first time was against Bellatrix after she had killed Sirius. His attempt was unsuccessful because, as Bellatrix mockingly explained: 'You need to really want to cause pain – to enjoy it – righteous anger won't hurt me for long…'
She married Rodolphus Lestrange after leaving Hogwarts "because it was expected of her" to marry a pure-blood. However, Rowling stated in an interview that Bellatrix truly loved Voldemort.
"The Lestranges should be here," said Voldemort quietly. In short Lord Voldemort was the sperm donor for the Lestranges as Bella's husband Rodolphus Lestrange was firing blanks. Hence why they had no child so Lord Voldemort said he would father a child with Bellatrix to help out his best deatheater friends.
Bellatrix's greatest fear was : abandonment by her Lord Voldemort. Bellatrix is a blind and die-hard servant of her master Lord Voldemort.
As much as Bellatrix loves Lord Voldemort, she equally hates Harry Potter, considering him the greatest threat to Voldemort and his plans. She will do anything to assist the Dark Lord's desire to defeat Harry.
Draco's refusal to reveal Harry's identity to Bellatrix was not because he liked him. It was because he believed that Harry was the only chance they had at defeating Voldemort. At first, Draco admired and revered Voldemort until he threatened his family's safety.
With all of those symptoms being met, it wouldn't be unreasonable to consider her as having a borderline personality disorder. Bellatrix Lestrange “was obsessively in love with Lord Voldemort, which extended to her being… attracted to him” (wiki).
Of all of the Death Eaters that appear in Harry Potter, there's no doubt that Bellatrix is the most evil. In addition to the fact that she was selflessly devoted to Voldemort and his mission (in fact, she was obsessed with him), she also showed that there was no depth of cruelty or malice to which she would not sink.
She Had A Fling With Voldemort
Her relationship was later confirmed with Harry Potter and the Cursed Child. The play claimed that Bellatrix had been unfaithful to her husband and had slept with Lord Voldemort after she was freed from Azkaban.
Narcissa the devoted mother
If Bellatrix managed to muster affection for anyone other than Voldemort, it was her younger sister (even at the height of the Second Wizarding War, Bellatrix and Narcissa called each other Cissy and Bella, no doubt childhood nicknames they'd given each other).
By the time he was Lord Voldemort (despite what I said earlier about the graveyard scene), Tom Riddle had become fully and completely asexual. The Death Eaters are characters featured in the Harry Potter series of novels and films. such as Severus Snape, Lucius Malfoy, and Peter Pettigrew had appeared in.
Helena Bonham Carter said that her character was afraid of Harry because she couldn't understand how a young boy was capable of overpowering Lord Voldemort.
The Cruciatus curse is named by Neville, who has reason to remember it as his parents suffered greatly under it. And the third, the Killing Curse, is named by Hermione; Moody mentions that it can't be blocked, and only one person is known to have ever survived it: Harry Potter.
In Deathly Hallows, Hermione faced a real test of her physical and psychological stamina. After being on the run from a bunch of Snatchers, the gang were taken to Malfoy Manor, where Bellatrix proceeded to torture Hermione using the Cruciatus Curse.
The first time Harry cast Cruciatus was in Harry Potter and the Order of the Phoenix when Harry Potter uses Crucio on Bellatrix Lestrange after she killed Sirius Black in the Department of Mysteries.
Bellatrix is approximately mid 40s in her first appearance and dies at about 46/47. Helena first played the role at age 41, and last played her at age 45, meaning there is only a two or three year difference.
Voldemort is a master manipulator. By humiliating Bellatrix as he does, he punishes her for her part in the failure at the Ministry of Magic — including her failure to finish off Tonks — and rouses her to try harder to murder members of her family.