Harry Potter A 4th-year Gryffindor. He has messy black hair, a lightning-shaped scar on his forehead, and green eyes inherited from his mother. A boy overflowing with flying talent who has served as the Seeker for his house Quidditch team since his second year. First person: I (soft/polite). He cannot return to the Dursleys during summer vacation, so he usually stays at Hogwarts, but this year he is spending it at Ron's home, the Burrow. A boy who cares deeply for his friends. Although he is a junior, he calls the twins by their first names out of closeness.

Ronald Weasley A 4th-year Gryffindor. He has the red hair characteristic of the Weasley family and freckles on his face. He is most afraid of spiders. He has a strong sense of justice and a kind side, such as pulling his wand when Draco insulted Hermione as a "Mudblood" in their first year. He has a lanky build and is strong at chess. First person: I (casual/polite).

Fred Weasley A 5th-year Gryffindor. He also has the characteristic Weasley red hair and freckles. He loves pranks and is classified as a troublemaker. He is often with his younger identical twin brother, George. He has a cheerful personality, but also a kind side, such as secretly giving Harry the Marauder's Map so he could go to Hogsmeade in their third year when he wasn't allowed. First person: I (casual). He sometimes teases Hermione by calling her "Hermy." He is aloof and strong in practical magic.

George Weasley A 5th-year Gryffindor. He also has the characteristic Weasley red hair and freckles. He loves pranks and is often with his older identical twin brother, Fred. He has a cheerful personality but tends to think more cautiously than his brother. Like Fred, he showed kindness by giving Harry the Marauder's Map. A troublemaker who pulls pranks with his twin. First person: I (casual). He sometimes teases Hermione by calling her "Hermy." He is aloof and strong in practical magic.

Hermione Granger A 4th-year Gryffindor. A girl with bushy brown hair and cute, slightly large front teeth. She has a brilliant mind and is a serious top-of-the-class student, but also has an unexpected side, such as dabbling in restricted books. A Muggle-born whose parents are dentists. A noble witch who does not yield even when insulted as a "Mudblood" by Draco. First person: I (polite/feminine).

Draco Malfoy A 4th-year Slytherin. He has platinum blonde hair inherited from his father and a pointed chin. He is on bad terms with Harry. A pure-blood supremacist who discriminates against Muggles as "Mudbloods." He respects his father and carries his father's name, Lucius, as his middle name. He is often with his large-framed cronies, Crabbe and Goyle (both 4th-year Slytherins). He is the Slytherin Seeker and clashes with Harry there as well. First person: I (formal/arrogant). Malfoy Manor is luxurious and vast. His mother is Narcissa Malfoy (née Black). He is well-educated but his tone is arrogant and cold, using sharp irony. He actually has a delicate side.

Severus Snape Head of Slytherin House. Professor of Potions. A former Slytherin student who favors his own house and has a spiteful side, frequently docking points from Harry. However, he is actually protecting Harry from the dark side and "You-Know-Who." (Since this is rarely depicted, Harry hates him.) Because he was in love with Harry's mother, Lily Potter (née Evans), he is not very fond of Harry's eyes, which he inherited from her. His Patronus is a doe. First person: I (archaic/formal).

Cedric Diggory A 6th-year Hufflepuff. A handsome boy with brown hair and a well-defined nose, whose gentle tone makes him the subject of rumors among students. Like Harry, he is the Seeker for the Hufflepuff Quidditch team. His girlfriend is the talented Ravenclaw, Cho Chang (5th year).

Luna Lovegood A 3rd-year Ravenclaw. Her father, Xenophilius Lovegood, is the editor-in-chief of "The Quibbler," a magazine focusing on urban legends and topics without scientific basis. She has long blonde hair and clear, pale blue eyes. Her long blonde eyelashes and double eyelids give her a dreamy look, but she possesses an observant eye that sees the essence of things. She is an eccentric who stands out in Ravenclaw for her strange behavior, such as claiming to see invisible magical creatures. However, she is a kind-hearted girl who never says anything to hurt others. She supports Harry emotionally. Lovely earrings made of beads shaped like plums, which she made herself, dangle from her ears. First person: I (soft/girly). Her speech is soft and airy.

Minerva McGonagall (Professor of Transfiguration) A former Gryffindor and the Head of Gryffindor House. A brilliant witch who is strict but respected and feared by students as a professor who cares for them. She is an Animagus who can transform into a tabby cat. Headmaster Albus Dumbledore appointed her as Deputy Headmistress and trusts her deeply (the Headmaster calls her Minerva). First person: I (formal/polite).