1. Nigel Wespurt Nigel, more famously just referred to as that anonymous ginger kid in the first film, who delivers a parcel to Ron, and the latter responds: "Oh, thank you Nigel& not now, Nigel, later, go on." Nigel is obsessed with Harry Potter, perhaps too much so, and is later killed by a Death Eater during the Battle of Hogwarts. (Via.)

2. Sir Cadogan "What villains are these that trespass upon my private lands? Who dares challenge Sir Cadogan? Back, you scurvy braggarts, you rogues!" - Cadogan, in regard to the Battle of Hogwarts Cadogan is the knight whose portrait takes over at the entrance to Gryffindor Tower after the Fat Lady's was destroyed by Sirius Black. He's widely considered insane, or at the very least, eccentric. (Via.)

3. Pansy Parkinson Pansy Parkinson was a Slytherin who served on the controversial Inquisitorial Squad. She was the 'queen bee' of a group of girls, and dated Draco Malfoy. She was later condemned by her classmates for favoring turning Harry over to Voldemort. (Via.)

4. The Weird Sisters The Weird Sisters were a popular band during the students' time at Hogwarts, and who played at the Yule Ball in The Goblet of Fire. The band's most famous songs are 'Do the Hippogriff,' 'Magic Works,' and 'This is the Night.' The members were all male and described as 'extremely hairy,' adorned in 'artfully torn' black robes. (Via.)

5. Padma and Parvati Patil Padma and Parvati Patil were twin sisters who studied alongside Harry, Ron, and Hermoine, the former a Ravenclaw, and the latter a Gryffindor. Parvati was Harry's date to the Yule Ball in The Goblet of Fire and later joined Dumbledore's Army. Both sisters are into Divination and often insensitive to other classmates, especially Luna Lovegood. (Via.)

6. The Fat Lady The Fat Lady guarded the entrance to Gryffindor Tower for the majority of the series, refusing anyone entry without the proper password, and typically scolded those who returned late or woke her up while she was sleeping. (Via.)

7. Grawp Grawp is Hagrid's half-brother, a giant measuring 16-feet tall, 'small for a giant,' according to Hagrid. He can speak little English and grasps even less of proper manners. He rarely responds to Hagrid's attempts at civilizing him, and instead likes tearing down trees in the Forbidden Forest. (Via.)

8. Malfalda Hopkirk Malfalda Hopkirk worked in the Improper Use of Magic Office at the Ministry of Magic, and was best known for issuing notices to those who violated either the International Statute of Wizarding Secrecy or the Decree for the Reasonable Restriction of Underage Sorcery (such as when Dobby used the Hover Charm in Philosopher's Stone). In Deathly Hallows, Hermoine takes possession of her using a Polyjuice potion to infiltrate the Ministry, bumbling around and ultimately learning that Malfalda was an assistant to Dolores Umbridge. (Via.)

9. Cormac McLaggen "McLaggen makes Grawp look a gentleman." - Hermoine One year above Harry, Cormac McLaggen was a Gryffindor from an influential wizarding family, who tried to court Hermoine. He became a member of Horace Slughorn's 'Slug Club,' and Ron reffered to Cormac as the 'King Slug.' He was notoriously known for Gryffindor's Quidditch team loss to Hufflepuff. (Via.)

10. Blaise Zabini Blaise is good friends with Draco Malfoy and Pansy Parkinson, his fellow Slytherins. His backstory is interesting, as his mother was famous and beautiful, who had been widowed seven times by the end of the series. Wealthy from these deaths, Blaise was part of the Slug Club and harbored a great distaste for Muggles and Muggle-borns. His name is also really cool. (Via.)

11. Marge Dursley Marjorie 'Marge' Dursley is Vernon's sister, who is similarly neckless and unattractive. Harry has always had to refer to her as 'Aunt,' and takes solace in that she rarely visits Privet Dr. because she breeds bulldogs in the countryside. In a memory during The Order of the Phoenix, Harry remembers when one of her dogs chased him up a tree and she wouldn't call it off. He gets his accidental revenge when he losers his temper in The Prisoner of Azkaban and inflates her up like a balloon. (Via.)

12. Olympe Maxime "I 'ave nevair been more insulted in my life! 'Alf-giant? Moi? I 'ave--I 'ave big bones!" - Madame Maxime Madame Maxime was the Headmistress of Beauxbatons Academy of Magic at the time of The Goblet of Fire. She is known for her heavy French accent and traveling with her students in a big, power-blue carriage drawn by winged horses. Though technically a half-giantess, she tries to hide her heritage; when Hagrid takes her to the Yule Ball and reveals that he is also a half-giant, she is unimpressed. (Via.)

13. Mrs. Norris Owned by Hogwarts caretaker Argus Filch, Mrs. Norris is a cat well-known by students for catching those who are misbehaving or going where they should not be. Her abilities are so honed that she often--at least seemingly--catches Harry when he's under his Invisibility Cloak. (Via.)

14. Irma Pince "A warning: If you rip, tear, shred, bend, fold, deface, disfigure, smear, smudge, throw, drop, or in any other manner damage, mistreat, or show lack of respect towards this book, the consequences will be as awful as it is within my power to make them." - Irma's note in a library book Irma Pince is the highly possessive and protective librarian at Hogwarts, often intimidating its pupils, who thought of her as unpleasant, to say the least. As the librarian, she wouldn't allow students to do anything that was remotely suspicious or may cause any kind of damage to the books in the library's collection. (Via.)

15. Hannah Abbot Hannah was a Hufflepuff in Harry's year. She was a big fan of Cedric Diggory and later became a Prefect for Hufflepuff, as well as a member of Dumbledore's Army, though she was gone for a year after her mother was murdered by Voldemort. In her later years, she married Neville Longbottom and became the landlady of the Leaky Cauldron, above which they lived. Also, she makes awesome facial expressions in the movie. (Via.)

16. Pomona Sprout Pomona Sprout was a Professor of Herbology and Head of Hufflepuff House at Hogwarts. In The Chamber of Secrets, she saved lives by brewing the Mandrake Restorative Draught; helped oust Snape after Dumbledore's death; threw dangerous plants onto invading Death Eaters in the Battle of Hogwarts; and generally never stopped winning. (Via.)

17. Lee Jordan Lee Jordan was a Gryffindor student who was best friends with Fred and George Weasley and partook in many pranks with them, but most famously was a Quidditch commentator whose narration of games often went too far. (Via.)

18. The Bloody Baron Originally the Baron was a Slytherin, who, after Hogwarts, fell in love with Helena Ravenclaw, who did not love him back. Rowena Ravenclaw, her mother and one of Hogwarts's founders, sent him to search for her in Albania. However, upon finding Helena, she refused to return and he, a 'hot-tempered man,' hastily killed her. Realizing what he'd done, he took his own life and to this day is covered in her blood (thus, his name). He then took to haunting Slytherin House. (Via.)

19. Ernie Macmillan "... [I]n case youre getting ideas, I might tell you that you can trace my family back through nine generations of witches and warlocks and my bloods as pure as anyones..." - Ernie, yelling at Harry Potter A pure-blood wizard, Ernie was a Hufflepuff who was good friends with Hannah Abbot and initially believed Harry was the Heir of Slytherin after his friend Justin Finch-Fletchley was petrified in Year Two. Eventually, he came around and apologized to Harry, becoming a member of Dumbledore's Army in his fifth year and fought in the Battle of Hogwarts. He was also sorta obsessed with Hermoine from afar (who isn't, though?). (Via.)

20. Griphook Griphook was the managing goblin at Gringotts Bank, whose looks are deceiving. He appears conniving and unsympathetic, but when the Ministry of Magic declares wizards superior to goblins he refuses to acknowledge anyone his master and goes on the lam. Ultimately he helps Harry and the gang search for Helga Hufflepuff's Cup. (Via.)