Harry uses it during the final battle when he goes into the forest to sacrifice himself. He brings back his parents and Sirius and Lupin for a short while and he talks to them before he goes to Voldemort.

Yes in a way he did see his parents again but only in spirit form, when dualing in the graveyard something unexpected happend, because harry and Lord Voldemort’s wands cores both came from the same phoneix it created a strong magical bond between them.

He saw the spirits of all people that had died by Voldemort’s wand up to that point. This included the spirit of his parents. He saw reflections of their memories. It’s not as if their would be ghost (like; they were never ghosts) spirits got transported to the graveyard.

The Mirror was discovered by Harry Potter on the night that he used his father’s Invisibility Cloak for the first time, to search the restricted section of the library for information about Nicolas Flamel. Upon looking into it, Harry saw his late parents, Lily and James Potter.

So, it is quite possible that she sees her deceased husband and gryffindor with the quidditch cup in the mirror of erised. Minerva had everything in life except love. The mirror of erised shows us our deepest desires and McGonagall wanted to be loved. She ditched her love Dougal McGregor.

Quirinus Quirrell

The Acromantulas are among the most dangerous creatures in the forest (FB), although Grawp may have taken the title of ‘most dangerous’ away from them now. At least 50 centaurs of fighting age live in the forest (OP33).

The Forest in Harry Potter and the Philosopher’s Stone Harry and Draco ended up finding the creature, but were also confronted with a mysterious hooded figure. The centaur Firenze saves them from it and explains that the figure is actually Voldemort, who is trying to gain eternal life.

A centaur was standing over him. At the time Harry encountered Voldemort in the Forbidden Forest, as Quirrell drank the unicorn’s blood, Quirrell was probably at, or close to, his magically strongest, and he also the benefit of Voldemort’s powers (although they are weakened).

When Harry later learned he had to die for Voldemort to regain mortality, he headed in to the Forbidden Forest and, using the Resurrection Stone, called his parents, James and Lily, his godfather, Sirius Black, and his close friend, Remus Lupin, to give him the strength to face Voldemort for what he believed would be …

He met Lily and Petunia Evans when he was nine and fell deeply in love with Lily, becoming a close friend of hers.

Once Snape knew where Harry was camping, he needed to create the conditions of need and valor for the sword to be retrieved. He uses his Patronus to lure Harry and leaves the sword at the bottom of a frozen lake.