Why didn't Hermione use the Time-Turner to save Sirius?
Changing the past is hazardous and apparently nigh impossible. Buckbeak could be rescued because he already had been rescued, while Sirius was seen to have died by several witnesses. Even if it were possible, Hermione only had the Time Turner for one year.
Why didn't they use Time-Turner to stop Voldemort?
These instances followed Rowling's stance on self-fulfilling prophecies. With the established Harry Potter time travel rules, Harry and his friends never had the option of traveling back in the past to kill Voldemort. If they were to do so, Voldemort would already be dead in the present timeline.
Why doesn't Hermione use the Time-Turner in later movies?
Rowling says, “I smashed all remaining Time-Turners during the battle in the Department of Mysteries, removing the possibility of reliving even short periods in the future.” Because Hermione had already returned the Time-Turner in her possession, not a single one escaped unscathed, making time travel officially ...
Why didn't they use Time-Turner in Goblet of Fire?
The time turner couldn't have been used to save Harry's parents because it was too far back in time; you cannot go back more than five hits without there being very bad consequences. They saved Buckbeak because he was about to die three hours before.
The presence of time-turners ended up creating big plot holes in the Harry Potter saga, as these could have been used to prevent some of the biggest tragedies in the series, mainly the death of Harry's parents.
Why did McGonagall trust Hermione with the Time-Turner?
Perhaps McGonagall saw Hermione's potential and knew that someone like her could show that the Time-Turner had applications for students looking to take on extra credit at school or, in the case of Prisoner of Azkaban's finale, save innocent people from evil.
Honestly, Hermione knew Dobby was a lost case... nothing could have revived Dobby after the attack or she would have definitely helped Harry with Dobby considering she was the girl who started S.P.E.W(Society for the Elfish welfare) and fought for elf rights. There was nothing to be done at that point.
In the film, she only hugs Harry, and just gives a hesitant handshake to Ron (Note: This was the result of Emma Watson being hesitant to hug both Daniel Radcliffe and Rupert Grint in public view, with her hugging Radcliffe during filming having to be frozen for a few seconds to get the desired effect due to Watson ...
In Harry Potter and the Cursed Child, Harry's son, Albus Potter, and his best friend, Scorpius Malfoy, used a Time-Turner to go back in time to the Triwizard Tournament to save Cedric Diggory's life.
After the Mintumble incident, the Department of Mysteries terminated such experiments, and Ministry of Magic laws dramatically restricted the use of time-turners.
While the potential benefits of Felix Felicis are undeniable, the absence of liquid luck in the Dark Lord's arsenal can be attributed to a combination of his obsession with power, arrogance, pride, and overconfidence in his own magical abilities.
The prolonged misery of being exposed to dementors kept the prisoners locked within their own minds, so Sirius lost the ability to transform. However, Sirius explained that the knowledge of his innocence kept him sane in a way most of Azkaban's prisoners were not.
Dumbledore's lack of belief that Sirius is innocent is also suspect. Sirius was a member of the Order of the Phoenix which fought against Death Eaters, but Sirius also was as close to James as a brother, the Potters even took him in when he ran away from home.
Dumbledore didn't know for certain that Sirius was innocent, and for the most part, it didn't matter. Sirius wasn't useful. Also, see Remus - Dumbledore saw no use for him, so didn't help him.
They know she's an impostor. They've been warned", so obviously the request for the wand was unexpected even to him. It's thus pretty safe to conclude that the real Bellatrix had reported her wand stolen and alerted Gringotts prior to the trio's attempted break in.
When Harry realized he had to die and go into the forest, Hermione hugs Harry and Ron doesn't. Why not? Because the movie directors were Harry/Hermione shippers who wanted to keep Ron away from their OTP.
When Dobby's last words before dying in Harry's arms are "Such a beautiful place, to be with friends. Dobby is happy to be with his friend, Harry Potter."
Why didn't Dumbledore use the time turner to save Harry's parents?
IIRC, you can only use the time-turner to go back 5 hours or thereabouts. Any more than that could seriously harm whoever is using the time turner. So that's why it was no longer possible to save James and Lily Potter during Harry's time.
Other than Pansy Parkinson with absolute zero room-reading skills and Professor McGonagall sending all the Slytherins to the dungeons, from what I understand McGonagall literally had them locked up in the dungeons cells than give them a choice whenever to fight against Voldemort or remain in the common room, because ...
Thinking about her future, she realised that wedding a Muggle who didn't know that she was a witch would mean Minerva would follow her mother's footsteps and live unhappily with her wand locked away, shredding all of her ambitions.
How did Hermione avoid getting killed by the Basilisk?
She knows that a direct glance from the Basilisk can instantly kill, so she navigates Hogwarts using a mirror to peer around corners. Ultimately, her ingenuity saves her life. She does indeed come across the Basilisk and is only petrified instead of killed thanks to her hand mirror.
In Harry Potter and the Cursed Child, it is revealed that Bellatrix gave birth to Voldemort's daughter Delphi in Malfoy Manor before the Battle of Hogwarts.
The simplest thing is just to quote it: Hermione says she used the Time Turner to attend several classes at once, and for the first two terms of the year she's taking all twelve subjects when normal students take nine. Around Easter she drops out of Divination, and at the end of the year she drops Muggle Studies.
