Minerva McGonagall

Stern, strict, yet always discerning and fair, the Transfiguration professor and head of Gryffindor House holds her own against raucous students. A wise witch, registered Animagus and exceptional duelist, she serves as one of Harry's greatest allies in the darkest of times.

Alastor 'Mad-Eye' Moody

As one of the most skilled Auror's of all time, Moody earned the nickname "Mad-Eye" for his paranoia and battle-scarred body. He had lost an eye, leg and part of his nose fighting against the Dark Arts. For almost the entirety of Harry's fourth year at Hogwarts, Moody was held captive in his own magical trunk by Barty Crouch Jr., who impersonated him using Polyjuice Potion. Moody fought bravely for Harry's safety in the battle that followed.

Lucius Malfoy

Lucius is the patriarch of an aristocratic pure-blood family and father of Draco Malfoy. Although he served and fought for Voldemort in the First Wizarding War, he avoided imprisonment by claiming he was under the Imperius Curse. He did however continue to show prejudice to Muggle-borns, and attempted to discredit Arthur Weasley by planting the Dark Lord's diary amongst Ginny's schoolbooks. When Voldemort returned to power, Lucius once again served him as a Death Eater.

Gellert Grindelwald

When Dumbledore was young and rather rash, he met and befriended Grindelwald, who was expelled from his school for experimenting with dark magic. The two boys aspired to attain power and glory with the phrase "For the Greater Good." Their plans went awry when an argument and a three-way duel broke out among them and Dumbledore's brother Aberforth, which resulted in the accidental death of their sister. This effectively ended the friendship between Grindelwald and Dumbledore, and they went their separate ways. Voldemort and Harry discover their paths cross again, and must delve into their history to find what they're searching for.

Hermione Granger

Born to Muggle parents, this whip-smart witch blew everyone away with her thirst and penchant for knowledge. Author J.K. Rowling considers her the "brightest character," and that's difficult to disagree with, even by wizarding standards. She's not afraid to fight for what she believes is right, regardless of whether it's popular or not. Hermione's gifted with logic, resourcefulness, and loyalty, which serves her friendship with Ron and Harry to the very end.
Fun Fact: Hermione used to have very large front teeth until Goblet of Fire. Draco Malfoy hit her with a spell that caused them to grow uncontrollably, and Madam Pomfrey magically shrunk them to normal size – probably something her dentist parents wouldn't approve of.

Dobby the House Elf

Voice Actor: Toby Jones

House Elves have special magical powers but are bound to obey their masters. Dobby was formerly the Malfoy's house elf, but Harry tricked Lucius into setting him free. As a free elf, Dobby went to work at Hogwarts and although he was at times an annoyance, he remained loyal to Harry, using his special powers to protect him in the direst of times.

Harry Potter

The main protagonist of the titular story, Harry Potter was orphaned early on in life when Lord Voldemort discovered a prophecy that stated "either must die at the hand of the other for neither can live while the other survives." Although the prophecy refers to Voldemort and possibly two other wizards, Voldemort marked Harry as his equal, inadvertently giving him the lightning bolt scar on his forehead and a share of his own special powers. Harry lives with his surviving Muggle aunt and her family and does not come to know of the wizarding world until he receives an invitation to attend Hogwarts School of Witchcraft and Wizardry. As he grows up, he witnesses Voldemort's return to power and must take up the fight himself to vanquish the Dark Lord forever.
Fun Fact: Harry would've been placed in the Slytherin House at Hogwarts (the same as Voldemort's), but Harry emphatically requested the Sorting Hat not to.