The biggest revelation in
Bellatrix used a powerful "love potion" on Voldemort and they have sex while he is temporarily obsessed with her.
Delphini (b. March 1998), known by the nickname Delphi, was a British half-blood Dark witch, the daughter of Tom Riddle and Bellatrix Lestrange. Being the only child of Lord Voldemort, she was able to speak Parseltongue, and she became the only known living heir of Salazar Slytherin after the demise of her father.
Delphini, nicknamed Delphi, is the titular main antagonist of Harry Potter and the Cursed Child. Although she initially introduces herself as the niece of Amos Diggory, Delphi is in fact, the child of Lord Voldemort and Bellatrix Lestrange and has only one goal, restoring her father.
The most speculated reason why Voldemort wanted a child is that he needed a backup relative to help him create a new body. Voldemort is immortal, but it would only take a stray curse to destroy his body and send him back to the pathetic state he was living in before the events of Philosopher's Stone.
Delphini "Delphi" Diggory is Voldemort's secret daughter (wow, the Potterverse is turning into a soap opera). She wants to resurrect the Dark Lord—not necessarily to bring evil to the world, but just because she wants to meet her dear ol' dad. It's actually kind of sweet…in a completely evil way.
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.
The events of Harry Potter and the Deathly Hallows saw both of Delphi's parents gone from the face of the Earth, leaving Delphi alone. After that big Battle of Hogwarts, she was placed in the care of a woman named Euphemia Rowle. Not much is known about Euphemia herself, except for what Delphi says about her.
She meets young Albus Potter and leads him to believe she is the niece of Amos Diggory, and cousin to the long-dead Cedric Diggory. But in the play's third act, Delphi reveals herself to be the daughter of Voldemort and Bellatrix Lestrange.
That's right! You heard me- their daughter. For those unaware, in the Cursed Child (which was written for a POST Harry Potter world)- it's revealed that at one point in time, Bellatrix and Voldemort conceived a child of their own- Delphini.
Merope, left to her own devices, managed to give Tom Riddle Senior a love potion, which made him fall in love with her. They eventually got married.
Tom Senior was loved by Merope, who became obsessed enough to use a Love Potion on him. Tom M. Riddle was obsessively loved by one of his Death Eaters, Bellatrix Lestrange. Bellatrix was so eager to please him that she would 'prune' her 'family tree' by murdering her niece.
The most likely reason why Lord Voldemort's nose disappeared and he devolved into such an evil-looking creature is that as he dabbled deeper into the Dark Arts, his appearance gradually became as distorted as what remained of his twisted soul.
His reaction to Bella's death was akin to his reaction at the loss of the Cup, which was when he realised that his own immortality was jeopardised amidst war and his own death could have been near.
Yes, it is said by J.K. Rowling that Lily Potter was pregnant with their second child when she was murdered by Voldemort. She had finally talked James into ending this enmity with Severus Snape. Even worse, she had even convinced him to make Snape godfather of the second child.
Because to a pureblood fanatic like Bellatrix, Harry is a Mudblood because one of his parents (Lily Evans) was a Muggleborn. Anyone with Muggle ancestry is one, including Snape since his father was a Muggle (Tobias).
She Pretends To Be Cedric Diggory's Cousin
Delphini's full name is unknown, and she's never officially used the surnames Lestrange or Riddle in canon. However, she does take on the alias of Delphini Diggory as part of her plot to bring back her parents.
Cedric's death becomes a point of trauma and guilt for Harry and continues to haunt him, which leads him to form Dumbledore's Army as a way to help teach his fellow students to protect themselves in battle. His death is also a focal point of the stage play Harry Potter and the Cursed Child.
Nonetheless, despite her initially benevolent nature, Nagini's blood curse eventually turned her into a snake permanently. Though it is unknown if she became evil as a result of that, or was turned evil as a result of Voldemort turning her into a Horcrux. As a snake, Nagini was completely loyal to Lord Voldemort.
Epilogue. After the war ended, McGonagall was fully instated as the Headmistress of Hogwarts and was awarded the Order of Merlin, First Class by new Minister for Magic Kingsley Shacklebolt.
Therefore Harry would be considered only 'half' wizard, because of his mother's grandparents." Delphini's paternal grandfather, Tom Riddle Senior, was a muggle, so she is a half-blood.
Delphi's whole existence was hidden from the Malfoys, even though she was born under their roof. She was seemingly smuggled out of the manor to be raised in secret by someone else. There was no way of Narcissa knowing. If she knew, she may have raised her… as her sister's daughter.
IN "CURSED CHILD", SHE AND VOLDEMORT HAD A DAUGHTER
Harry Potter and the Cursed Child dropped a major revelation: Bellatrix and Voldemort have a secret illegitimate daughter together. That means Bellatrix cheated on her husband Rodolphus.
This was something that dated back to her original appearance in Harry Potter and the Order of the Phoenix. Because Bellatrix had spent so much time in a horrible prison, Bonham Carter wanted her to appear really "savage." She wanted Bellatrix's gnarly teeth to really standout and frighten children.
In the Cursed Child we find out that Bellatrix and Voldemort had a daughter, which means that Bellatrix would have been pregnant during the books.