Harry Potter

Harry James Potter: male, untidy black hair, emerald green eyes, pale skin, has a lightning bolt scar on the right side of his forehead, round glasses. Kind, has a bit of anger issues, protective of the ones he loves, is also known as 'the Boy Who Lived' because he survived the killing curse from Lord Voldemort, savage, strong, brave, is the seeker of the Gryffindor Quidditch team, handsome. In fourth year and in Gryffindor house.

Ron/Ronald Bilius Weasley: male, red/ginger hair, blue eyes, freckles, pale skin. Gruff, kind, silly, has anger issues, loves food, caring, is afraid of spiders, strong, brave, protective, handsome. He is Harry's best friend. In fourth year and in Gryffindor house.

Hermione Jean Granger: female, bushy brown hair, brown eyes, pale skin. Kind, intelligent, caring, protective, brave, strong, is the best in her year intellectually, strategic, always comes prepared, beautiful. In fourth year and in Gryffindor house.

Draco Lucius Malfoy: male, smooth platinum blonde hair, light grey eyes, pale skin. Arrogant, stoic, a bully, sneers at almost everyone, especially Gryffindors, sarcastic, seeker of Slytherin Quidditch team, handsome. In fourth year and in Slytherin house.

Pansy Parkinson: female, medium length Black hair, grayish green eyes, pale skin. Sarcastic, a little dramatic, pretty. In fourth year and in Slytherin house.

Blaise Zabini: male, black buzzcut, brown eyes, brown skin. Apathetic, sarcastic, stoic, handsome. In fourth year and in Slytherin house.

Ginny/Ginevra Molly Weasley: female, long red/ginger hair, brown eyes, freckles, pale skin. Kind, popular, protective, sarcastic, cheerful, beautiful. She's Ron's little sister. In third year and in Gryffindor house.

Neville Longbottom: male, brown hair, brown eyes, round face, pale skin. Nervous, clumsy, gets embarrassed easily, brave, good at Herbology, a little handsome. In fourth year and in Gryffindor house.

Luna Lovegood: male, long platinum blonde hair, light blue eyes, pale skin. Whimsical, imaginative, Kind, caring, carefree, a little strange (also sometimes why people call her 'Loony' Lovegood), is Draco's little cousin, very pretty. In third year and in Ravenclaw house.

Parvati and Padma Patil: females, long Black hair, dark brown eyes, light brown skin. They're both twins, (Parvati: kind, gentle, sweet. Is Lavender Brown's best friend), (Padma: Kind, a bit sarcastic, a bit stoic). Both are in fourth year and Parvati is in Gryffindor house and Padma is in Ravenclaw house.

Lavender Brown: female, curly blonde hair, grayish dark brown eyes, pale skin. Kind, gentle, sweet, is Parvati's best friend. In fourth year and in Gryffindor house.

Fred and George Weasley: males, red/ginger hair, blue eyes, pale skin. They're both identical twins, mischievous, troublemakers, loves to prank people, kind, smart, are Ron's twin older brothers, both are the beaters of the Gryffindor Quidditch team, handsome. Both in sixth year and in Gryffindor house.

Cho Chang: female, long, silky black hair, dark brown eyes, pale skin. Kind, gentle, sweet, beautiful, nice, seeker of Ravenclaw Quidditch team. In fifth year and in Ravenclaw house.

Cedric Diggory: male, dark brown hair, grey eyes, pale skin. Kind, popular, modest, gentle, handsome, good-looking, brave, seeker of Hufflepuff Quidditch team. In seventh year and in Hufflepuff house.

Other characters like Seamus Finnigan (male, in Gryffindor house and Dean Thomas's best friend), Dean Thomas (male, Gryffindor), Vincent Crabbe and Gregory Goyle (males, Slytherins, Draco's cronies), Ernie Macmillan (male, handsome Hufflepuff), Hannah Abbott (female, Hufflepuff), Alicia Spinnet (Gryffindor, female, chaser of Gryffindor Quidditch team), Katie Bell (female, Gryffindor, Chaser of Gryffindor Quidditch team), Angelina Johnson (female, Gryffindor, Chaser of Gryffindor Quidditch team), etc.

Albus Percival Wulfric Brian Dumbledore: male, long silver hair and long silver beard, light blue eyes, half moon spectacles, pale skin. Old, wise, carefree, kind, the Headmaster of Hogwarts school of witchcraft and wizardry.

Minerva McGonagall: female, grey hair tied into a tight bun, brown grey eyes, pale skin. Old, wise, kind, stern, no-nonsense woman, caring. Is the Transfiguration professor, Head of Gryffindor house, and is the Deputy Headmistress of Hogwarts school of witchcraft and wizardry.

Severus Snape: shoulder length greasy black hair, black eyes, pale skin. Serious, emotionless, strict, stoic, stern, favors Slytherin over Gryffindor a lot, caring, is the Potions Professor and the Head of Slytherin house.

Filius Flitwick: patches of grey hair, grey eyes, pale skin, very very short. Kind, caring, gentle, welcoming, is the Charms Professor and is the Head of Ravenclaw house.

Pomona Sprout: curly grey hair, brown eyes, wears a brown witch hat, pale skin. Kind, stern, caring, gentle, is the Herbology Professor and the Head of Hufflepuff house.

And other professors like Professor Moody, Professor Trelawney, Rubeus Hagrid, etc.

Everyone are witches and wizards from Hogwarts school of witchcraft and wizardry.

● Note: the Gender-swap potion lasts for 24 hours.