Harry James Potter

Gryffindor

Role: Protagonist, "The Boy Who Lived"

Wand: Holly and phoenix feather, 11"

Patronus: Stag

Blood Status: Half-blood

Orphaned as a baby when Voldemort killed his parents. Survived the Killing Curse with a lightning-bolt scar. The Chosen One destined to defeat the Dark Lord. Brave, loyal, sometimes impulsive. Master of the Deathly Hallows.

Hermione Jean Granger

Gryffindor

Role: "The Brightest Witch of Her Age"

Wand: Vine wood and dragon heartstring, 10¾"

Patronus: Otter

Blood Status: Muggle-born

Exceptionally intelligent witch with encyclopedic magical knowledge. Master of spells and potions. Often saves Harry and Ron with quick thinking and research. Champion for house-elf rights (S.P.E.W.). Future Minister for Magic.

Ronald Bilius Weasley

Gryffindor

Role: Harry's best friend, strategic thinker

Wand: Willow and unicorn hair, 14"

Patronus: Jack Russell Terrier

Blood Status: Pure-blood

Sixth son of the Weasley family. Master chess player with strategic mind. Overcomes insecurity to become brave hero. Destroys Slytherin's locket Horcrux. Future Auror and Weasleys' Wizard Wheezes co-owner.

Albus Percival Wulfric Brian Dumbledore

Former Gryffindor

Role: Headmaster of Hogwarts

Wand: Elder Wand (Deathly Hallow)

Patronus: Phoenix

Greatest wizard of the age. Defeated Grindelwald (1945). Master of all Deathly Hallows. Wise mentor to Harry. Complex past involving his sister Ariana and friendship with Grindelwald. Dies protecting students and orchestrating Voldemort's defeat.

Minerva McGonagall

Gryffindor Head

Role: Deputy Headmistress, Transfiguration

Animagus: Tabby cat (registered)

Patronus: Cat

Strict but fair teacher. Master of Transfiguration. Fiercely protective of students and loyal to Dumbledore. Led Hogwarts' defenses during Battle of Hogwarts. Becomes Headmistress after the war.

Severus Snape

Slytherin Head

Role: Potions Master, DADA (Year 6), Headmaster

Patronus: Doe (same as Lily Potter)

Title: The Half-Blood Prince

Most complex character in series. Double agent protecting Harry while appearing to support Voldemort. Master of Occlumency, Legilimency, and potion-making. Loved Lily Potter his entire life. "Always."

Pomona Sprout

Hufflepuff Head

Role: Herbology Professor

Head of Hufflepuff House. Expert in magical plants. Provided Mandrakes to cure petrification victims. Kind and nurturing teacher who cares deeply for her students and plants.

Filius Flitwick

Ravenclaw Head

Role: Charms Professor

Part-goblin wizard. Master of Charms and dueling. Excitable and enthusiastic teacher. Led defenses during Battle of Hogwarts with powerful protective enchantments.

Remus John Lupin

Gryffindor

Role: Defense Against the Dark Arts (Year 3)

Marauder Name: Moony

Patronus: Wolf

One of the Marauders. Best DADA teacher Harry ever had. Taught Harry the Patronus Charm. Married Nymphadora Tonks. Father of Teddy Lupin. Died in Battle of Hogwarts.

Rubeus Hagrid

Role: Gamekeeper, Care of Magical Creatures

Wand: Oak, 16" (broken, hidden in umbrella)

Expelled in third year (framed for opening Chamber of Secrets). First magical person to befriend Harry. Deeply loyal to Dumbledore. Loves dangerous creatures. Brings Harry to Hogwarts and into wizarding world.

Horace Slughorn

Former Slytherin Head

Role: Potions Master (returns Year 6)

Collects talented students ("Slug Club"). Provided crucial memory about Horcruxes to Harry. Initially cowardly but redeems himself by fighting in Battle of Hogwarts.

Sybill Trelawney

Role: Divination Professor

Great-great-grandmother: Cassandra Trelawney (famous Seer)

Made the prophecy about Harry and Voldemort. Often dismissed as a fraud but has genuine prophetic abilities in trance states. Eccentric and dramatic teaching style.

Arthur & Molly Weasley

Arthur: Works at Ministry (Misuse of Muggle Artifacts Office). Fascinated by Muggle technology. Kind and curious.

Molly: Fierce mother of seven. Powerful witch. Kills Bellatrix Lestrange protecting Ginny. "NOT MY DAUGHTER, YOU BITCH!"

Bill Weasley

Gryffindor

Role: Curse Breaker at Gringotts

Oldest Weasley child. Works for Gringotts in Egypt then England. Marries Fleur Delacour. Scarred by Fenrir Greyback but doesn't become full werewolf.

Charlie Weasley

Gryffindor

Role: Dragon keeper in Romania

Second oldest. Studies dragons. Helped with Triwizard Tournament dragons. Former Quidditch Seeker. Fights in Battle of Hogwarts.

Percy Weasley

Gryffindor

Role: Ministry employee

Third son. Ambitious and rule-following. Prefect and Head Boy. Sides with Ministry against family (estranged). Returns during Battle of Hogwarts, reconciles with family. "I was a fool!"

Fred & George Weasley

Gryffindor

Role: Pranksters, Entrepreneurs

Identical twins. Masters of pranks and joke products. Founded Weasleys' Wizard Wheezes. Left Hogwarts in spectacular fashion during Umbridge's regime. Fred dies in Battle of Hogwarts (last words: joking with Percy).

Ginny Weasley

Gryffindor

Role: Powerful witch, Seeker/Chaser

Youngest Weasley, only daughter. Possessed by Tom Riddle (Year 2). Overcomes trauma to become talented witch and Quidditch player. Marries Harry Potter. Mother of James Sirius, Albus Severus, and Lily Luna Potter.

Sirius Black

Gryffindor

Role: Harry's godfather, Marauder

Animagus: Black dog (Padfoot)

Marauder Name: Padfoot

Wrongly imprisoned in Azkaban for 12 years. Escaped to prove innocence and protect Harry. Last of the noble Black family to reject dark ideology. Killed by Bellatrix Lestrange at Department of Mysteries.

Nymphadora Tonks

Hufflepuff

Role: Auror, Metamorphmagus

Ability: Can change appearance at will

Patronus: Wolf (after falling for Lupin)

Auror and member of Order. Can morph appearance (hair color changes with mood). Marries Remus Lupin. Mother of Teddy Lupin. Killed in Battle of Hogwarts alongside Remus.

Alastor "Mad-Eye" Moody

Gryffindor

Role: Legendary Auror

Features: Magical eye, wooden leg

Paranoid but effective Auror. "CONSTANT VIGILANCE!" Impersonated by Barty Crouch Jr. for entire fourth year. Killed by Voldemort during Battle of Seven Potters.

Kingsley Shacklebolt

Role: Auror, Minister for Magic

Highly skilled Auror who protects Muggle Prime Minister. Cool under pressure. Becomes temporary then permanent Minister for Magic after the war. Reforms Ministry.

Lord Voldemort

Slytherin

Birth Name: Tom Marvolo Riddle

Wand: Yew and phoenix feather, 13½"

Main antagonist. Born to witch and Muggle. Obsessed with immortality and pure-blood supremacy (ironic given his half-blood status). Created 7 Horcruxes. Cannot feel love. Defeated by his own rebounded Killing Curse.

Bellatrix Lestrange

Slytherin

Born: Bellatrix Black

Wand: Walnut and dragon heartstring, 12¾"

Voldemort's most fanatical follower. Sadistic and unstable. Tortured Longbottoms into insanity. Killed Sirius Black, Dobby, and others. Killed by Molly Weasley protecting Ginny.

Lucius Malfoy

Slytherin

Role: Wealthy pure-blood, former Death Eater

Draco's father. Wealthy, influential. Claims to have been under Imperius Curse. Slips Tom Riddle's diary to Ginny. Loses favor with Voldemort after repeated failures. Defects during Battle of Hogwarts to save family.

Barty Crouch Jr.

Slytherin

Role: Fanatical Death Eater

Son of Barty Crouch Sr. Imprisoned in Azkaban, saved by mother. Impersonated Mad-Eye Moody for entire fourth year. Orchestrated Voldemort's return. Received Dementor's Kiss.

Peter Pettigrew

Gryffindor

Marauder Name: Wormtail

Animagus: Rat

Betrayed James and Lily Potter to Voldemort. Framed Sirius for murder. Hid as Ron's pet rat "Scabby" for 12 years. Helped resurrect Voldemort. Killed by own silver hand when he hesitated to kill Harry.

Fenrir Greyback

Role: Savage werewolf

Most savage werewolf alive. Infects people deliberately, especially children. Bit Remus Lupin as child. Works with Death Eaters but not marked. Killed by Ron and Neville in Battle of Hogwarts.

Draco Lucius Malfoy

Slytherin

Role: Harry's rival

Wand: Hawthorn and unicorn hair, 10"

From wealthy pure-blood supremacist family. Harry's rival from first meeting. Joins Death Eaters under duress. Cannot kill Dumbledore, showing moral conflict. Saved by Harry three times in final battle. Redeemed in epilogue.

Dolores Jane Umbridge

Role: Senior Undersecretary, High Inquisitor

Signature: Pink cardigans, kitten plates

Not Death Eater but arguably worse. Sadistic authoritarian who tortures students. Takes over Hogwarts in Year 5. Uses blood quill punishment. Sent Dementors after Harry. One of most hated characters. Imprisoned after war for crimes against Muggle-borns.

Gilderoy Lockhart

Ravenclaw

Role: DADA Professor (Year 2)

Fraud who steals others' accomplishments via Memory Charms. Incompetent teacher obsessed with fame. Backfired Memory Charm leaves him with permanent memory loss. Resides in St. Mungo's.

The Dursleys

Members: Vernon, Petunia, Dudley

Species: Muggles

Harry's only living relatives. Abusive and neglectful. Petunia (Lily's sister) resents magic. Vernon is aggressively anti-magic. Dudley shows redemption at end, thanking Harry for saving his life.

Luna Lovegood

Ravenclaw

Role: Eccentric but wise friend

Patronus: Hare

Believes in creatures others dismiss (Nargles, Crumple-Horned Snorkacks). Wise and perceptive despite seeming odd. Can see Thestrals. Provides emotional support and unique perspective. Marries Rolf Scamander (Newt's grandson).

Neville Longbottom

Gryffindor

Role: Underdog hero

Patronus: Non-corporeal

Initially clumsy and forgetful. Shows increasing bravery throughout series. Parents tortured into insanity by Bellatrix. Could have been "the Chosen One." Leads DA resistance during Year 7. Destroys Nagini (final Horcrux) with Gryffindor's sword. Becomes Herbology professor.

Cho Chang

Ravenclaw

Role: Ravenclaw Seeker

Harry's first love interest. Dated Cedric Diggory before his death. Brief relationship with Harry complicated by grief and Marietta betraying DA. Fights in Battle of Hogwarts.

Cedric Diggory

Hufflepuff

Role: Triwizard Champion

Hufflepuff Seeker and champion. Honorable, talented, popular student. Tied with Harry to win Triwizard Tournament. Murdered by Peter Pettigrew on Voldemort's orders. First major death of sympathetic character—marks series' dark turn.

Dobby

Species: House-elf

Enslaved to Malfoy family until Harry tricks Lucius into freeing him (Year 2). Devoted to Harry. Works at Hogwarts kitchens (paid!). Dies heroically saving Harry and friends from Malfoy Manor. "Dobby is free."

Kreacher

Species: House-elf

Black family house-elf. Initially hostile due to years of dark influence. Betrays Sirius indirectly. Shows capacity for loyalty when treated kindly by Harry. Leads house-elves in Battle of Hogwarts.

Griphook

Species: Goblin

Gringotts goblin saved by Harry from Malfoy Manor. Helps with Gringotts break-in but betrays trio by taking Gryffindor's sword. Represents complex goblin-wizard relations and different concepts of ownership.

James Potter

Gryffindor

Marauder Name: Prongs

Animagus: Stag

Harry's father. One of the Marauders. Initially arrogant but matured. Married Lily Evans. Defied Voldemort three times. Died protecting family without wand in hand.

Lily Potter

Gryffindor

Maiden Name: Lily Evans

Patronus: Doe

Harry's mother. Brilliant at Charms and Potions. Former friend of Snape. Married James Potter. Her sacrificial love protection saved Harry and became his greatest power. "Always."

Gellert Grindelwald

Durmstrang

Role: Dark wizard, predecessor to Voldemort

Former friend/lover of Dumbledore. Sought Deathly Hallows. Dark wizard who terrorized Europe. Defeated by Dumbledore (1945). Imprisoned in Nurmengard. Showed remorse at end, refusing to help Voldemort. Killed by Voldemort for information about Elder Wand.