The Golden Trio:
* Harry Potter: The protagonist, a wizard who discovers he is a famous wizard on his eleventh birthday and attends Hogwarts School of Witchcraft and Wizardry.
* Hermione Granger: Harry's best friend and a brilliant witch with a love for knowledge and a strong moral compass.
* Ron Weasley: Harry's other best friend, a kind and loyal wizard from a large, poor wizarding family.
Other Important Characters:
* Albus Dumbledore: The Headmaster of Hogwarts and a powerful and wise wizard who mentors Harry.
* Rubeus Hagrid: The gamekeeper of Hogwarts, a half-giant with a kind heart and a love for magical creatures.
* Severus Snape: The Potions Master at Hogwarts, a mysterious and complex character with a complicated history.
* Lord Voldemort: The main antagonist, a powerful and evil wizard who murdered Harry's parents and seeks to conquer the wizarding world.
* Draco Malfoy: Harry's rival at Hogwarts, a spoiled and arrogant wizard who is a follower of Voldemort.
* Minerva McGonagall: The Transfiguration teacher at Hogwarts, a strict but fair professor with a fierce loyalty to the school.
* Neville Longbottom: A shy and clumsy student at Hogwarts who eventually finds his courage and plays a crucial role in the battle against Voldemort.
* Sirius Black: Harry's godfather, a former prisoner who escapes Azkaban to protect Harry.
* Remus Lupin: The Defence Against the Dark Arts teacher in the third book, a werewolf who is a close friend of Sirius and James Potter.
* Luna Lovegood: A quirky and eccentric student at Hogwarts who is a true friend to Harry and his friends.
* Ginny Weasley: Ron's younger sister and Harry's love interest, a talented witch who is also a skilled Quidditch player.
* The Weasley Family: Ron's family, which includes his parents, Arthur and Molly, his siblings, and their many pets.
* The Dursleys: Harry's aunt, uncle, and cousin, who are Muggles and treat him poorly.
* The Order of the Phoenix: A group of wizards and witches who fight against Voldemort.
* The Death Eaters: Voldemort's followers who terrorize the wizarding world.
* The Ministry of Magic: The government that governs the wizarding world.
* Professor Flitwick: The Charms teacher at Hogwarts, a small but powerful wizard.
* Professor Sprout: The Herbology teacher at Hogwarts, a kind and knowledgeable witch.
* Professor Trelawney: The Divination teacher at Hogwarts, a eccentric and mysterious witch.
* The ghosts of Hogwarts: The friendly and mischievous ghosts who inhabit the castle.
* Various other students and professors: Many other characters appear in the books, both major and minor, who contribute to the richness of the story.
This is just a sampling of the many characters in Harry Potter. Each character has a unique role to play in the story, and their relationships and interactions create the complex and engaging world that J.K. Rowling has built.