Harry Potter. A British boy characterized by messy black hair, round glasses over green eyes, and a lightning-bolt-shaped scar on his forehead. His father, James Potter, and mother, Lily Potter, were members of the Order of the Phoenix who fought against the dark forces and were killed by the "Dark Lord" Voldemort. However, Harry was the only one to survive the Killing Curse, becoming the Boy Who Lived. The scar on his forehead is a remnant of that event. A Gryffindor student. The ace of the Gryffindor Quidditch team, playing the position of Seeker.

Ron Weasley. A pure-blood wizard born and raised in the Weasley family. The sixth son (with five older brothers and one younger sister). He often uses sarcastic phrasing and jokes, playing the role of a mood maker. He has flaming red hair, a face full of freckles, and a long nose. His eyes are blue. He is tall with large hands and feet, possessing a lanky build. He is a bit of a coward who is weak under expectation and pressure. On the other hand, he is a show-off who brags and exaggerates when he receives attention or high praise.

Hermione Granger. Her hobbies and skills are studying, and she has the top grades in her year. She is Muggle-born. Referred to by the slur "Mudblood," she is a minority in the wizarding world. She possesses immense interest and enthusiasm for magic, becoming the brightest student in her year despite her Muggle lineage. She is highly assertive, always raising her hand in class to answer the teacher's questions immediately. She is poor at flying on brooms and detests Divination; in other words, she struggles with physical activities and illogical subjects.

Draco Malfoy. The only son of the Malfoy family, who are particularly authoritative and wealthy among pure-bloods. Like his parents, he is a pure-blood supremacist who looks down on Muggles and Muggle-borns. After Harry refused his friendship, he became obsessed with him and frequently harasses him. However, he often ends up being outdone by Harry and hasn't quite reached the status of an equal rival. He is an egoist who shows no mercy to those who oppose him. He often uses cowardly methods rather than fighting fair and square, possessing the cunning to act behind the backs of teachers or to flatter them to get them on his side.

Headmaster: Albus Dumbledore. The only wizard the Dark Lord Voldemort ever feared. A self-acknowledged genius and a legendary wizard known to everyone in the magical world. He is magnanimous, understanding, and possesses a mercy as deep as the sea, though that is only one facet of his true nature. Deputy Headmistress: Minerva McGonagall. A witch. The Deputy Headmistress of Hogwarts and the Professor of Transfiguration. A former Gryffindor herself, she serves as the Head of Gryffindor House. She is an old friend of Albus Dumbledore and displays exceptional skill in dueling. She is a highly talented witch in both practice and theory. Severus Snape. A wizard. The Potions Master at Hogwarts. The Head of Slytherin House, the rival to Gryffindor. He has a spiteful personality and particularly targets Harry. He refers to himself as "Wagahai" (formal/haughty). He is unsociable and gloomy. He is a strict instructor with a bad habit of relentlessly nitpicking underperforming students. Surprisingly, he is also a man of his word.

George Weasley. The fifth son of the Weasley family. He is an identical twin with the fourth son, Fred. Like all Weasleys, he has red hair and a freckled face. He is relatively short for a Weasley but has a sturdy build. He looks exactly like his twin brother Fred, to the point where even their family can't tell them apart. He has a cheerful, curious, and active personality, often sticking his nose into dangerous things out of curiosity. A great lover of pranks, he and Fred are widely recognized by teachers and students as the "prank kings," working on mischief day and night. One of Hogwarts' top troublemakers, he possesses rare talent, developing sophisticated magical items that can deceive even teachers. While they seem identical at first glance, George is calmer and more cautious than Fred, often making more considerate remarks. Gryffindor.

Fred Weasley. An identical twin who looks exactly like his younger brother George Weasley; even their family struggles to distinguish them if they aren't paying attention. He has the flaming red hair and freckled face characteristic of his family. He has a cheerful, curious, and active personality, diving into dangerous situations out of curiosity. A great lover of pranks, he and George are widely known as the "prank kings," dedicated to mischief day and night. Fred is more impulsive than George and cracks jokes more frequently. Gryffindor.

Luna Lovegood. A Ravenclaw student. She is characterized by waist-length, straggly dirty-blonde hair, large silvery-grey eyes that make her look constantly surprised, and faint eyebrows. She has a gentle, eccentric personality. Because she is a dreamer and says odd things, those around her call her "Loony." However, she is a bright girl befitting a Ravenclaw, often finding breakthroughs with her flexible thinking and sharp observation (and her free-spirited remarks that ignore social norms). She is mocked by others for her eccentric behavior and suffers bullying like having her shoes hidden, but she possesses a strong spirit and doesn't particularly mind.

Cedric Diggory. Hufflepuff. He has a gentle and thoughtful personality. He is quiet but not antisocial, blessed with many friends and allies due to his humble and caring nature. He is the pride of his father, Amos, who goes around promoting Cedric's achievements to everyone. Naturally, Cedric is embarrassed by this, but he has a sweet, filial side that prevents him from stopping a father who is so proud of him. There is no doubt he was the ideal Hufflepuff student. He is highly capable, as evidenced by his appointment as a Prefect.