- Portrayed by: Samantha Clinch
A student around the same age as the main trio who has a rather notorious case of acne.
- Butt-Monkey: All but one mention of her involves her acne. The one not involving it is when Hermione mentions that Eloise has been pulled from Hogwarts by her father as the war against Voldemort gets worse.
- Epic Fail: Her attempt to clear up her acne resulted in Madame Poppy having to reattach Eloise's nose, albeit slightly off-center. On the upside, her acne improved slightly.
- The Ghost: She never appears in the books, only being mentioned a few times. She does appear very briefly in the film adaption of The Prisoner of Azkaban, even though she was not even mentioned in that book.
A student who, along with Jack Sloper, replaced Fred and George as Beaters for the Gryffindor team after they were banned from playing by Dolores Umbridge.
A student who, along with Andrew Kirke, replaced Fred and George as Beaters for the Gryffindor team after they were banned from playing by Dolores Umbridge.
A fourth-year student who joins the Quidditch team as a Beater in the 1996-1997 school year.
- Portrayed by: Ashley Virgil
A student who joins the Quidditch team as a Beater in the 1996-1997 school year.
- Portrayed by: Katy Huxley-Golden
A student who joins the Quidditch team as a Chaser in the 1996-1997 school year. Harry notes she is particularly good at dodging Bludgers.
Penelope "Penny" Clearwater
- Portrayed by: Gemma Padley
Ravenclaw's Prefect from Percy Weasley's year. She and Percy were in a relationship, and were named Head Girl and Boy at the end of their final year.
- Demoted to Extra: In the films, Penny is only briefly seen with Percy and is not one of the students petrified by the basilisk.
- Nice Girl: Pretty much the only things known about her personality is that she is nice and liked Quidditch.
- Secret Relationship: She and Percy kept their relationship secret, likely because of the teasing that would come from Percy's brothers if they knew. After it gets revealed, those fears prove pretty well founded.
- What Happened to the Mouse?: Although she and Percy were still together when they graduated, she is not mentioned after the third book until Hermione briefly uses her name as an alias when captured by Snatchers. Since Percy married a woman named Aubrey, it can be assumed they broke up at some point.
Ravenclaw student in the Trio's year. He is a member of Lockhart's Dueling Club in their second year, and later joins Dumbledore's Army. In the seventh book, he hears about the Trio's raid on Gringotts and escape on the dragon, and is beaten up by the Carrows for yelling about it in the Great Hall. He later participates in the Battle of Hogwarts.
- Curb-Stomp Battle: At the end of the fifth book, Terry is among the D.A. members who save Harry from an attack by Malfoy, Crabbe, and Goyle. The fight lasts just a few seconds, since the Slytherins were greatly outnumbered and the D.A. members had been training with Harry for most of the year.
- Recurring Character: He appears in five of the books, but never does anything major.
Ravenclaw student, and later on a prefect. He joined Dumbledore's Army, and later on participated in the Battle of Hogwarts.
- Portrayed by: Isabella Laughland
Leanne is a Hufflepuff student in the same year as Harry and his friends. A friend of Katie Bell who is present when she is injured by the cursed necklace. She later joins the student resistance at Hogwarts and fights in the final battle against Voldemort.
- Action Girl: Fights in the Battle of Hogwarts and survives, while many more experienced and skilled wizards did not.
- Adaptation Dye-Job: She is blond in the books but has black hair in the film.
- Adaptation Expansion: She is identified as a Huffulepuff student in the films while her house was unknown in the books. She also participates in the Battle of Hogwarts in the films, while she is not mentioned to be present in the book.
- Remember the New Guy?: She was never even mentioned prior to The Half-Blood Prince.
Order of the Phoenix
- Portrayed by: Brigitte Millar
A witch who fought for the Order in both wars against Voldemort. She is murdered by Death Eaters during the second war.
- Red Shirt: She appears briefly as a member of the Advance Guard, but does nothing else in the series before being killed in between the fifth and sixth books.
- "Don't these people realise what you've been through? What danger you are in? The unique position you hold in the hearts of the anti-Voldemort movement?"
A dark-haired with who is part of the Order and the Advance Guard sent to escort Harry.
- Put on a Bus: Although she only had one scene a couple books prior to getting on the bus, she does not participate in the last stages of the war against Voldemort due to being sent with the Dursley's to protect them from Voldemort.
Ministry of Magic
- Portrayed by: Jeff Rawle
A wizard in the Department for the Regulation and Control of Magical Creatures whose family lives near the Weasleys. His son Cedric goes to Hogwarts, and Amos is proud and ecstatic about his son becoming one of Hogwart's representatives in the Triwizard Tournament.
- Jerk with a Heart of Gold: While he can be slightly aggressive and brags a lot about his son's accomplishments, Amos is a good man who does not blame Harry for Cedric's death and thanks him for risking his life to return his son's body.
- Outliving One's Offspring: Cedric is his only child. Amos and his wife are completely crushed by their son's murder.
- What Happened to the Mouse?: He is strangely never seen or even mentioned again following Cedric's death, despite believing Harry and Dumbledore about Voldemort's return.
- Portrayed by: Ricky Wilson
A muggle born wizard who attended Hogwarts and was a member of the "Slug Club", Cresswell rose to become Head of the Goblin Liaison Office. He was forced to go on the run after the Ministry was taken over by Voldemort.
- Character Death: He was killed while on the run by a band of Snatchers.
- Chekhov's Gunman: Mentioned briefly by Slughorn to Harry in The Half-Blood Prince as a muggle-born student whom he had a friendship with before appearing in the final book.
- Too Dumb to Live: Even after the Ministry is taken over by Voldemort and the Daily Prophet becomes a Death Eater mouthpiece, Creswell continues to read it and believe some of the information it reports, even claiming that he had doubts that Snape killed Dumbledore and that Harry could have done it.Dean Thomas: I know Harry Potter. And I reckon he's the real thing the Chosen One, or whatever you want to call it.
Cresswell: Yeah, there's a lot would like to believe he's that, son, me included. But where is he? Run for it, by the looks of things. You'd think if he knew anything we don't, or had anything special going for him, he'd be out there now fighting, rallying resistance, instead of hiding. And you know, the Prophet made a pretty good case against him
Ted Tonks: The Prophet? You deserve to be lied to if you're still reading that much, Dirk.
Neville Longbottom's strict and proud grandmother who raised him after his parents were tortured into insanity by a group of Death Eaters after Voldemort's initial defeat. She is initially disappointed by her grandson's poor magical skills and timid personality, but grows proud of him as he gains in determination and strength during the second war against Voldemort.
- Apron Matron: Augusta Longbottom.
- Cool Old Lady: She is an elderly pure-blood witch who despises Voldemort and his Death Eaters, is immensely proud of her son and daughter-in-law's involvement in the Order of the Phoenix, and who can hospitalize a very powerful wizard and later survive one of the biggest battles in wizarding history while fighting alongside her badass grandson.
- Grande Dame: A very elderly and proud pure-blood witch who is perhaps not the best guardian to take care of Neville. Still, she loves her grandson
- Never Mess with Granny: The Death Eaters thought they could take her as a way to make Neville cooperate. Turns out she sent Dawlish to St. Mungo's and sent him a letter encouraging his continued resistance to their rule. Augusta later arrives at the Battle of Hogwarts and fights through the whole thing and survives.Neville: Thing was they bit off a bit more than they can chew with Gran. Little old witch living alone, they probably thought they didn't need to send anyone particularly powerful. Anyway, Dawlish is still in St. Mungo's and Gran's on the run.
- Offscreen Moment of Awesome: Whatever she did to Dawlish that put him into St. Mungo's. Then she spent a few months hiding from Death Eaters before somehow finding out about the climatic battle at Hogwarts, which she showed up just in time for.
- Screw Politeness, I'm a Senior!:
- "I'm not putting them on. I like a healthy breeze around my privates, thanks."
President of the Fresh Air Refreshes Totally (F.A.R.T.) movement, a group of wizards who refuse to wear muggle pants out in public, claiming that they "stem the magical flow at source".
- Alliterative Name: Like many wizards he has an alliterative name.
- All There in the Manual: His background as the head of F.A.R.T. is established in an entry from Pottermore.
- Bit Character: He appears briefly in The Goblet of Fire as one of the many wizards attending the Quidditch World Cup, with a unfortunate ministry official attempting to get him to change out of flowery woman's nightdress and put on pants instead.
- Portrayed by: Hazel Douglas
One of the most famous historians of the wizarding world, Bagshot is the author of A History of Magic and several other highly regarded books. She lives in Godric's Hollow and was a neighbor of both the Dumbledores and the Potters.
- Portrayed by:
The landlady of the Three Broomsticks pub in Hogsmeade.
- Brainwashed and Crazy: She is placed under the Imperius Curse by Draco in The Half-Blood Prince and used in his plots to kill Dumbledore.
Mary Elizabeth Cattermole
- Portrayed by: Kate Fleetwood
A muggle-born witch who is among those put on trial by Voldemort's regime. She is married to Reginald Cattermole and has three children: Maisie, Ellie, and Alfred.