Fantasy Literature

Dumbledore could speak Mermish, the language of merpeople, which is a rare ability even among powerful wizards. While he could also speak Gobbledygook (goblin language) and many human languages, Mermish is specifically mentioned as one of his special linguistic talents in the series.

The Bubblehead Charm creates a large air bubble around the caster's head, allowing them to breathe underwater. Cedric Diggory used this charm for the Second Task of the Triwizard Tournament in Goblet of Fire. The Summoning Charm (Accio) was used by Harry for the First Task.

In Deathly Hallows, Ron Weasley uses Polyjuice Potion to transform into Reginald Cattermole, a Ministry of Magic employee, to infiltrate the Ministry and steal the locket Horcrux. This happens during the infiltration scene at the Ministry of Magic. Runcorn, Yaxley, and Dawlish were other Death Eaters or Ministry officials present.

Bathilda Bagshot was a famous magical historian and the author of 'A History of Magic', a standard Hogwarts textbook. She lived in Godric's Hollow and was an old family friend of the Potters and Dumbledores. She was not a Muggle, Daily Prophet reporter, or Dumbledore's enemy - in fact, she was murdered by Voldemort and used as a snake host.

Thestrals are winged horses that are visible only to those who have witnessed death. This is why Harry couldn't see them until after Cedric Diggory's death in Goblet of Fire. They pull the Hogwarts carriages. Being a wizard, Quidditch player, or specifically Harry Potter (before witnessing death) doesn't grant visibility.

Nymphadora Tonks is a Metamorphmagus, meaning she can change her appearance at will without potions. She frequently changes her hair color and style - often to bubblegum pink, which becomes her signature look. Metamorphmagi cannot change their Patronus at will (it changes with emotional state), don't change wands daily, and being a werewolf is her husband's condition, not hers.

During their Horcrux hunt in Deathly Hallows, Harry, Ron and Hermione listen to the Wizarding Radio (program 'Potterwatch') to stay informed about the outside world and the resistance movement. They cannot safely use owls (tracked), Patronuses (requires skill and may be tracked), or the Daily Prophet (under Death Eater control).

Harry discovers in Deathly Hallows that he is descended from the Peverell family through the Ignotus Peverell line. This makes him the true master of the Deathly Hallows, specifically the Invisibility Cloak which is a family heirloom. The Peverell brothers were the original owners of the Hallows according to The Tale of the Three Brothers.

Fleur Delacour marries Bill Weasley, the eldest Weasley brother, in Deathly Hallows. Bill was a curse-breaker for Gringotts Bank and was attacked by Fenrir Greyback during the Battle of the Astronomy Tower. Their wedding takes place at The Burrow and is interrupted by Death Eaters.

After losing his powers following his attempt to kill Harry Potter, Voldemort fled to Albania to hide in the forests. He remained there weak and disembodied until Quirrell found him in the late 1980s. Albania is where he also sought the Ravenclaw diadem Horcrux during his travels.

Ginny Weasley attended the Yule Ball with Neville Longbottom, not Harry as she had hoped. This is mentioned in Goblet of Fire when Neville asks Ginny to be his partner after being rejected by Hermione. Harry went with Parvati Patil, and Ron with Padma Patil.

The Marauder's Map was created by four Gryffindor students who were also unregistered Animagi: James Potter (Prongs), Sirius Black (Padfoot), Remus Lupin (Moony), and Peter Pettigrew (Wormtail). They used their nicknames as signatures on the map. Fred and George Weasley found it years later in Filch's office.

In 'Harry Potter and the Order of the Phoenix', the prophecy regarding Harry and Voldemort is stored in the Department of Mysteries within the Ministry of Magic. The other locations are significant in the series but do not house the prophecy orbs.

The Deathly Hallows symbol was on the Peverell family tomb in Godric's Hollow graveyard. According to the tale, the three Peverell brothers were the original owners of the Deathly Hallows - the Elder Wand, Resurrection Stone, and Invisibility Cloak. The symbol represents these three items.

In Deathly Hallows, Voldemort placed a Taboo (jinx) on his name - anyone who spoke it would immediately reveal their location. This is how Death Eaters tracked Harry, Ron, and Hermione to Shaftsbury Avenue. Harry had spoken the name, breaking the protective enchantments around their camp.