Harry Potter
Protagonist. Skilled flier, speaks Parseltongue. Slytherin sorting shifts many fates. Wears glasses, green robes. Outperforms canon due to ambition-driven study, not Seeker fame.
Likes: Snakes, flying, friends, Hagrid, Sirius, magic, Slytherin, winning.
Dislikes: Voldemort, Muggles, Dumbledore.
Asclepius
Original character. Male snake, Harry's beloved pet. Fondly watches Harry's Parseltongue quirk.
Likes: Mice.
Dislikes: Indigestible things.
Ron Weasley
Canon sidekick. Bullied by Slytherins due to Harry's antics. "I" becomes "ore" due to author's novice writing. Red-haired, lanky.
Likes: Family, siblings, courage, Chudley Cannons, Gryffindor.
Dislikes: Poverty, overachieving brothers, hand-me-downs, bullies.
Hermione Granger
Canon heroine. Buckteeth. Closer to Ron without Harry, with altered Gryffindor dynamics.
Likes: Friends, studying, excelling, magic, parents, attractive people, effort.
Dislikes: Discrimination, prejudice, inefficient study, isolation, failure.
Draco Malfoy
Canon rival. Softer but still a bully, becomes Harry's friend but not sidekick.
Likes: Parents, lineage, pure-bloods, luxury, Quidditch, friendship, victory, cursed items.
Dislikes: Poor people, Gryffindor, failures, Muggle-borns, scary things.
Blaise Zabini
Canon character. Wealthy, judges by appearance. Handsome Black boy, popular with girls. Slytherin's ambition incarnate. Shifts from pure-bloodism, becomes Harry's sidekick.
Likes: Mother, beauty, admirable people.
Dislikes: Muggles, father, uncool people.
Bloom Azrael
Original character. "Pure-blood." Wealthy, cunning Slytherin. Abandons pure-bloodism as foolish, uses it strategically. Blonde, elite-minded, poor flier despite broom empire family. Inspired by a robot anime's supremacist leader.
Likes: Magic items, victory, profit, friends, excellence.
Dislikes: Fools, defeat, loss.
Farkas Sadalfas
Original character. Fallen Slytherin noble, claims pure-blood. Slytherin's non-Death Eater pure-bloodist. Poor, views Ron and Harry complexly. Short. Inspired by an SRPG's beastmaster.
Likes: Astronomy, mother, studying, Slytherin.
Dislikes: Loud people, Muggles, Muggle-borns, poverty.
Sirius Black
Canon character. Freed and redeemed earlier. Handsome. Retains Slytherin and pure-blood bias but restrains it for Harry. Rehabilitated via cousin and friend (Lupin). Skills and other friend obscured.
Likes: James, friends, adventure, respectable people, rebellion.
Dislikes: Authority, lineage, pure-bloodism, cruelty, family.
Peter Pettigrew
Canon character. Dealt fatal blow to Fudge's stomach. Outdone by Lucius's kill count but lacked Ministry connections, sent to Azkaban.
Likes: Strong people, James, friends.
Dislikes: Weaklings, himself.
Severus Snape
Canon character. Struggles due to Harry's Slytherin sorting. Ensured Harry got good roommates. Lost Polyjuice ingredients once.
Likes: ???
Dislikes: ???
Albus Dumbledore
Canon character. Knowingly left Harry with abusive Dursleys via Arabella Figg.
Likes: ???
Dislikes: Himself.
Rubeus Hagrid
Canon character. Unbreakable spirit, high magic resistance, skilled with magical creatures. Adored by Harry.
Likes: Dragons, cool magical creatures.
Dislikes: Cruelty, rudeness.
Quirinius Quirrell
Canon character. Ex-Muggle Studies professor. Decent theorist, weaker in practice.
Likes: Praise, trust.
Dislikes: Evil, weakness.
Dolores Umbridge
Canon character. Terrible teacher, limited by short-term role. Boring lessons but gave exam tips for her own advancement.
Likes: Authority, power, wizarding society, pure-bloodism.
Dislikes: Half-breeds, mixed-bloods, incompetence, friendship.
Minerva McGonagall
Canon character. Fair, skilled, dignified teacher. Hostile to Slytherin in Quidditch but otherwise impartial.
Likes: Gryffindor, Quidditch, children.
Dislikes: Slytherin's rough play, Voldemort.
Garfiel Gafgarion
Original character. Platinum blonde, Slytherin prefect, four years Harry's senior. "Pure-blood," moderately wealthy. Teaches Harry Slytherin ways. Loses to Percy in all subjects. Inspired by an SRPG's dark knight, originally commoner.
Likes: Juniors, reasonable people, duty-bound behavior.
Dislikes: Unfair seniors, peer pressure, shirkers.
Gemma Farley
Canon character. Slytherin female prefect, four years Harry's senior. Resents Slytherin bias but bullies naturally, looks down on Hufflepuffs.
Likes: High grades, advancement, friends, lovers, fun people.
Dislikes: Prejudice, judgmental Gryffindors, boring people.
Percy Weasley
Canon character. Stiff Gryffindor prefect. Worries about his brother and favored girl with Slytherin delinquents. Outperforms original characters academically.
Likes: Family, status, authority, power, wealth.
Dislikes: Delinquents, discrimination, laziness.
Agrias Altoria Beorve
Original character. Blonde, Gryffindor female prefect. Caring, admired by Alicia Spinnet and Lavian. Pursued Percy, lost to a Ravenclaw junior. Inspired by an SRPG's female knight.
Likes: Chivalry, courage.
Dislikes: Nitpicking, Muggle prejudice.
McGillis Caro
Original character. Blonde, tall, muscular Slytherin, three years Harry's senior. Caro family, shunned for Death Eater ties, loves pure-bloodism and Slytherin. Welcomes mixed-bloods in-house, hated elsewhere. Inspired by an anime's tragic figure.
Likes: Slytherin kids, pure-bloodism, strength, history.
Dislikes: Gryffindors, Slytherin prejudice.
Ricardo Marthenas
Original character. Blonde, lanky Slytherin, three years Harry's senior. Mixed-blood, turned to pure-bloodism to fit in, became a bully. Exposed by Harry, lost favor. Inspired by a unicorn anime's conflicted character.
Likes: Comrades, Quidditch.
Dislikes: Hypocrisy.
Mysterious Female Student
Original character. Slytherin, three years Harry's senior. Sociable, ambitious. Approaches Caro and McGillis to seem caring for prefect candidacy.
Likes: Friends, power, attractive men.
Dislikes: Poverty, unattractive men.
Banarge Bist
Original character. Black-haired Hufflepuff, three years Harry's senior. Wealthy, complex family. Diligent, honest, popular with older men. Sweet-natured. Inspired by a unicorn anime's hero, toned down to avoid overshadowing.
Likes: Tinkering, magical duels.
Dislikes: Prejudice, discrimination, bullying.
Andromeda Tonks
Canon character. Fanon tweaks. Reunited with Sirius via Dumbledore, softened his Slytherin bias with practical advice.
Likes: Family, alcohol.
Dislikes: Slytherin, Muggle-born prejudice, religious relatives.
Daphne Greengrass
Canon character. Slytherin, Harry's year. Black-haired, fanon tweaks. Never led bullying but passively joined. From a pure-blood family with untarnished reputation.
Likes: Honor, fame, Slytherin, pure-bloodism, family.
Dislikes: Unfair Slytherin treatment, biased headmasters, blood curses.