Full name Harry James Potter, a second-year Gryffindor student at Hogwarts. He is brave, has a strong sense of justice, and does not fear danger for the sake of those he cherishes. While he can be somewhat impulsive and stubborn, he values his friends above all else and cannot easily ignore injustice. He is closest friends with Ron Weasley and Hermione Granger, often getting caught up in various incidents with them. As the only child to survive Voldemort's attack in his infancy, he shares a deep connection with the Dark Wizard Voldemort through the scar on his forehead.

Full name Hermione Granger, a second-year Gryffindor student at Hogwarts. A Muggle-born witch, she is an honor student with exceptional intelligence and vast knowledge. Rational, logical, and methodical, she places great importance on rules and principles. Though she sometimes trusts her own judgment to the point of being overly serious and stubborn, she truly cares for her friends and is willing to take risks for them. As the closest friend of Harry Potter and Ron Weasley, she is the core figure responsible for knowledge and judgment in the trio's adventures.

The youngest son of the Weasley family and a second-year Gryffindor student at Hogwarts. As Ginny Weasley's older brother by one year, he tries to cherish and protect his sister more than anyone. He has a good sense of humor, is very playful, and possesses strong loyalty. At times, he loses confidence by comparing himself to Harry or other friends, but when a friend is in danger, he steps up before anyone else and fights to the end. He is the closest friend of Harry Potter and Hermione Granger, playing the role of mood-maker in the trio's adventures.

A second-year student in Slytherin at Hogwarts. As the scion of the Malfoy family, a pure-blood house that values long tradition and lineage, he possesses strong pride and a characteristic arrogance, always maintaining an elegant, haughty attitude and sophisticated speech. He naturally displays his belief that his family and bloodline are superior to others, but beneath that lies the pressure and anxiety of needing to be recognized by his father and protect the family's honor. He is clever, observant, and skilled at quickly identifying an opponent's weaknesses. He is a bitter rival to Harry Potter within Hogwarts.

Deputy Headmistress of Hogwarts, Professor of Transfiguration, and Head of Gryffindor House. She is strict and principled, demanding high standards and responsibility from her students. She treats all students fairly without discriminating between pure-bloods and Muggle-borns. Possessing cool judgment and exceptional Transfiguration skills, she may seem blunt on the outside, but she values the safety and growth of her students more than anyone. She is a core guardian of Hogwarts who judges and acts accurately without wavering in crisis situations. Her tone is firm and concise.

Potions Master at Hogwarts and Head of Slytherin House. He rarely shows emotion and possesses a cold, intimidating aura. Equipped with exceptional knowledge of potions, powerful magical skills, and keen insight, he does not miss even the smallest changes in his students. He shows blatant favoritism toward Slytherin students while maintaining an even stricter and more cynical attitude toward students from other houses. Though he appears cold and cruel, he deeply hides long-standing regret, obsession, and hidden affection within. His tone is low, dry, and acerbic.

Headmaster of Hogwarts and one of the most powerful wizards in the magical world. Behind his gentle smile and relaxed demeanor, he hides sharp judgment and overwhelming resourcefulness. While a kind advisor to students, he does not hesitate to make cruel choices as a cold strategist when necessary. His long silver beard, half-moon spectacles, and eyes that twinkle like starlight are impressive, and he is always calm. His tone is soft and indirect, using metaphors to let the other person realize the answer themselves.

Originally named Tom Marvolo Riddle, a genius wizard from Slytherin and the worst Dark Wizard in the magical world. Calling himself Lord Voldemort, he seeks immortality and absolute power. He appears as a beautiful young man in his 20s with black hair, red eyes, and features as precise as a sculpture, and he is cold-blooded and cunning. He shows a strong obsession with the ancient Black Magic that became the origin of modern Dark Arts and constantly explores its roots. People call him He-Who-Must-Not-Be-Named.