The Head of Slytherin is Horace Slughorn (who left the role to Severus Snape for fifteen years before taking it up again in 1996) and the House's patron ghost is the Bloody Baron.
Professor McGonagall is head of Gryffindor house and is the Transfiguration teacher.
Voldemort was Salazar's heir, and as far as it is explained, he is taking up the mission in the way he believes Salazar had intended, with the Chamber and the Basilisk.
The Head of Hufflepuff is Pomona Sprout and the Fat Friar is the House's patron ghost. Hufflepuff corresponds roughly to the element of earth, and it is for that reason that the House colours were chosen: yellow represented wheat, while black was emblematic of soil.
1. Voldemort. Tom Riddle took the core qualities of Slytherin to new heights, as he became arguably the most powerful dark wizard of all time. He learned how to split his soul and create numerous Horcruxes, thereby making himself immortal as long as the Horcruxes existed.
Severus Snape, Horace Slughorn, Andromeda Tonks, Narcissa Malfoy and Regulus Black were all Slytherin heroes in their own way, if you think about it. And Merlin – as in, yes, King Arthur's advisor and the most famous wizard in history – was a Slytherin.
Hufflepuffs don't need to show off
In the past, J.K. Rowling has said, 'In many, many ways, Hufflepuff is my favourite house. '
Filius Flitwick is the Charms Master at Hogwarts and the head of Ravenclaw house. He is a very short, dwarf-like man.
The Head of Slytherin is Horace Slughorn (who left the role to Severus Snape for fifteen years before taking it up again in 1996) and the House's patron ghost is the Bloody Baron.
Head of Ravenclaw house and Hogwarts Charms master, Filius Flitwick taught Hogwarts students the importance of enunciating their spells correctly – although Hermione helped. Exceedingly accomplished at Charms, Professor Flitwick was reportedly also a duelling champion in his youth.
The story of Chamber of Secrets, as you know, is that the Heir of Slytherin has returned and he's out for Mudbloods. The Heir of Slytherin turns out to be Ginny Weasley, who is being controlled via a magical diary that once belonged to Tom Riddle, AKA Voldemort.
Ginny is a pureblood witch born 11 August 1981, the seventh child and only daughter of Arthur and Molly Weasley. She attends Hogwarts School of Witchcraft and Wizardry, and is sorted into Gryffindor house, along with the rest of her family.
The Heir of Hufflepuff was none other than Cedric Diggory, who was well on his way to fulfilling the prophecy of the Heir of Hufflepuff when he was tragically murdered by Peter Pettigrew. Thus, the prophecy would remain unfulfilled forever.
Harry is the magical Heir of Gryffindor (and he's also a descendent of Godric), Neville of Hufflepuff, Hermione of Slytherin and Luna of Ravenclaw.
Peter Pettigrew, (a.k.a. Wormtail), is the only Death Eater known to have been in a House other than Slytherin (Gryffindor) while at Hogwarts.
Mad-Eye Moody is a Hufflepuff.
After the Second Wizarding War, Neville Longbottom was known to have taken over the job as Head of Gryffindor.
While most people in the universe thought he was a traitor who killed Hogwarts headmaster Albus Dumbledore (spoiler alert) and betrayed the Order, we find out he was just acting on the orders of Dumbledore and that this was an elaborate plan.
Thankfully, Hogwarts' Board of Governors appointed McGonagall as Headmistress after Snape's death, a title which she still holds in the series' current timeline.
The Heir of Ravenclaw was an individual prophesized by the centaur Harmonthrep (Ajrand) to bring honor and glory to the House of Ravenclaw. The Heir of Ravenclaw was in time revealed to be Brian Dumbledore (Ajrand).
Wanda Maximoff (Scarlet Witch) - Slytherin
Though it is Hufflepuff that is the house best known for loyalty, once a Slytherin's affection is earned, they can be incredibly faithful.
Moaning Myrtle
Born in the late 1920s to Muggle parents, Myrtle Warren started her Hogwarts life in the early 1940s, where she was sorted into Ravenclaw. She had no friends, and was bullied relentlessly because of her glasses and acne.
“I'm in Gryffindor, obviously… but I totally rigged my answers,” she said. “I could totally tell which answers were going to get me into Gryffindor, and so those were my answers. I do think I'd be in Gryffindor anyway, but I definitely manipulated the quiz in my favor.
A Hufflepuff's patience, kindness and reliability make them excellent people. They're the Cedric Diggorys of this world, humble to a fault, and loyal to a tee.