Chapter Summaries

Su Er attended his first week of Hogwarts classes, impressed Professor Flitwick with his Floating Charm and earned Hufflepuff fifteen points. In Potions, Snape criticized Su Er's Cure for Boils but still awarded him one point, leaving Su Er wary of the professor's scrutiny.

• Professor Binns's History of Magic lecture put nearly the whole class to sleep, while Professor Flitwick demonstrated the danger of mispronouncing the Floating Charm and taught the students to levitate feathers.
• Su Er successfully levitated his feather, and Professor Flitwick awarded Hufflepuff fifteen points; afterward, Hufflepuffs asked Su Er for spellcasting advice.
• Su Er attended Astronomy and Defence Against the Dark Arts, where Justin joked about the garlic smell in Professor Quirrell's classroom and Quirrell offered stories about vampires and Inferi.
• Su Er considered Professor Dumbledore's trap for Professor Quirrell and decided to stay out of it while keeping Hermione away from the danger.
• During Potions, Snape criticized Mr. Boot's ground nettles and closely watched Su Er brew a Cure for Boils; he called Su Er's potion barely usable but awarded Hufflepuff one point.

Su Er became a topic of conversation after earning a point from Snape, while Hufflepuff students looked ahead to flying classes and Quidditch tryouts. Before flying lessons began, Malfoy confronted Su Er but backed down after remembering the frightening chill he had felt on the train.

• Hufflepuff students and the Weasley twins celebrated Su Er earning a point in Snape's Potions class, and Diggory recalled that Hufflepuff had last won the House Cup in 1913.
• Morn explained Quidditch to Justin and Su Er, while Su Er studied potion-making and considered the recipes Snape had changed.
• Su Er and Hermione wrote to their families, delivered their letters to Little Gray, and spent Saturday studying in the library.
• The school announced that Hufflepuff and Ravenclaw would begin flying classes on Thursday, prompting students to talk about Quidditch tryouts.
• Malfoy approached Su Er outside the Great Hall but lost his nerve and let him pass; Harry and Ron then discussed inviting Su Er and Neville to Hagrid's Hut.

Su Er watched Neville break his arm during flying class and later learned that Harry and Ron planned to meet Malfoy after curfew. When Hermione rushed off to stop them, Su Er decided he would follow that night to keep her from getting caught.

• Neville received a Remembrall, which Malfoy soon snatched, and later broke his arm in a flying-class accident.
• Su Er attended the delayed flying lesson, where Justin’s claims of being an accomplished flyer proved false.
• Hermione told Su Er that Malfoy had challenged Harry and Ron to a midnight duel in the Trophy Room near an out-of-bounds corridor.
• Hermione hurried away to stop Harry and Ron, and Su Er resolved to follow her that night.

Su Er warned Harry, Ron, Hermione, and Neville that Malfoy had lured them into a trap, then helped them evade Filch and Snape. On his way back to the Hufflepuff dormitory, Su Er encountered the strange Professor Kettleburn and heard a crash overhead before deciding to go to bed.

• Su Er surprised Harry, Ron, Hermione, and Neville in the Trophy Room and told them Malfoy was not coming and Filch was nearby.
• Su Er hid Hermione inside a large trophy as Snape and Filch searched the room, then reunited her with the others once they had left.
• Su Er led the group out of the Trophy Room, and they separated at the stairs after Harry and Neville thanked him.
• Su Er hid from Professor Kettleburn, who collected a fallen piece of meat and left the Castle with a bucket.
• Su Er heard loud crashes overhead but returned through the barrel passage to his dormitory, intending to sleep before Snape's Potions Class.

After Gryffindor lost all its House points, Su Er learned how Harry, Ron, Hermione, and Neville had encountered a three-headed dog guarding a trapdoor. Hermione recovered her spirits and spent the week studying the Switching Spell with Su Er as Hogwarts approached Halloween.

• Su Er learned that McGonagall had deducted all of Gryffindor’s points after Harry and Ron were caught breaking rules, while Dumbledore had prevented Snape from expelling them.
• Su Er worried about Hermione, then found her in good spirits on Monday and heard how she and Neville had escaped Filch while Harry and Ron were punished.
• Hermione told Su Er that a three-headed dog guarded a trapdoor in the Fourth-Floor Corridor, but said she was more excited about casting Alohomora.
• Hermione persuaded Su Er to study the advanced Switching Spell, and McGonagall gave them guidance and a library reading list.
• Su Er, Hermione, Neville, and Hannah spent the week studying together until Halloween arrived at Hogwarts.

Su Er and Hermione were stopped by Filch while practicing magic, then Su Er searched Hogwarts’s seventh floor for the Room of Requirement and encountered Quirrell. He decided to continue searching cautiously the next day, then spent the evening studying and eating with his Hufflepuff friends.

• Filch confronted Su Er and Hermione in a classroom, but left after inspecting their genuine permission slip from Professor McGonagall.
• Hermione wished for a place to practice magic undisturbed, prompting Su Er to remember the Room of Requirement and its location near a troll picture on the seventh floor.
• Su Er searched the seventh-floor corridors but stopped at dusk to go to dinner without finding the room.
• Su Er collided with Professor Quirrell on the stairs, avoided looking him in the eyes, and wondered whether Voldemort was heading to the Room of Requirement.
• Justin beat Morn at wizard’s chess, and Morn went to the kitchens to fetch snacks while Su Er read about Transfiguration and explained a Switching Spell to Justin.
• Morn returned with food, and Su Er ate before going to sleep.

Su Er visited Dumbledore’s office after being caught examining a tapestry, and explained that he was practicing advanced Transfiguration to make a unicorn for his little sister, Angel. Dumbledore gave him guidance on Layered Transfiguration, leaving Su Er with a clearer path toward his Christmas gift.

• Su Er tried several ways to interact with the troll tapestry before Dumbledore found him and invited him to his office.
• Dumbledore showed Su Er around the castle and led him into the Headmaster’s Office.
• Dumbledore offered Su Er Cockroach Clusters and asked about his recent practice of the Switching Spell.
• Su Er explained that he wanted to make a unicorn for Angel after promising her one for Christmas.
• Dumbledore explained Layered Transfiguration and advised Su Er on how to improve his technique.

After receiving a Transfiguration lesson and a rare book from Dumbledore, Su Er practiced layered transformations with Hermione but repeatedly failed. During Flying Class, Madam Hooch’s lesson on balance gave Su Er a sudden new idea.

• Dumbledore taught Su Er about layered transformations, lent him a rare book, and invited him to ask questions about Transfiguration.
• Su Er told Hermione about the lesson, and they decided to test the transformation technique after dinner.
• Su Er and Hermione repeatedly failed to add a lasting horn to a transformed horse, leaving classroom debris for Filch to find.
• Professor McGonagall suggested that Su Er practice less often so Filch could clean the classrooms.
• During Flying Class, Su Er heard Madam Hooch explain balance, fell off his broom, and exclaimed that he had realized something.

Su Er discovered that Hermione was missing on Halloween and went to find her, only to encounter Quirrell and a troll with her in the corridor. They hid from the approaching creature, leaving their fate uncertain.

• Madam Hooch deducted ten points from Hufflepuff after Su Er flew too high during class.
• Su Er learned that Hermione had missed lessons and hurried to find her after Parvati said she had seen her near the girls' bathroom.
• Su Er entered the girls' bathroom, then found Hermione outside and led her toward the Halloween feast.
• Su Er and Hermione spotted Quirrell hurrying through the corridor and heard a troll approaching.
• Su Er covered Hermione's mouth, and the two hid in the shadows as the troll drew near.

Su Er and Hermione encountered a troll in the corridor, then joined Harry and Ron when the troll attacked them. They trapped the troll and knocked it unconscious, though Ron was injured, and Harry explained that he had come looking for Hermione.

• Su Er and Hermione hid from a troll, then hurried toward Ron's screams when they realized he was in danger.
• Su Er reached Harry and Ron and told them to jump on his signal while he and Hermione prepared to trap the troll.
• Su Er levitated the troll's club as Hermione changed the floor beneath it, causing the troll to stumble and fall.
• Su Er dropped the club onto the troll and knocked it unconscious, but landed on Ron and hurt him.
• Harry thanked Su Er and said he and Ron had come because they heard Hermione was there.

Su Er, Hermione, Harry, and Ron faced a troll in the underground classrooms, and McGonagall awarded Su Er and Hermione twenty house points each for their bravery. The next day, Su Er reunited with the others and kept his role in the encounter vague when his Hufflepuff friends asked about it.

• Snape and McGonagall found Su Er, Hermione, Harry, and injured Ron beside the troll, and Harry told them that Su Er and Hermione had come to save him and Ron.
• Hermione explained that she and Su Er had encountered the troll while looking for a way out, then tried to protect Harry and Ron; McGonagall reprimanded them but awarded them twenty points each.
• Su Er and Hermione left the underground classrooms and passed a pale, flustered Quirrell on the stairs before agreeing to meet the next day.
• The next morning, Su Er joined Harry, Ron, and Hermione, and Ron said Madam Pomfrey had healed his broken ribs.
• Su Er told Justin and Morn that he had seen the troll and given the professors a little help, leaving the Hufflepuffs astonished that first-years could have faced it.

Su Er and Hermione practiced Transfiguration in the winter cold, then Hermione discovered a rune-covered fire charm in the Library that showed a blue flame inside a bottle. Su Er secretly copied Hermione’s homework with Geminio while pretending to study, as the chapter left the Warmth Bottle spell awaiting translation.

• Su Er and Hermione made a lifelike horned horse, but Su Er said it still could not move and would only last an hour.
• They ran into Harry carrying a broomstick, and Su Er guessed that Harry had joined the Gryffindor Quidditch Team.
• Hermione found a book of fire charms with a rune-covered page depicting a blue flame inside a bottle and offered to translate the spell.
• After Hermione left to fetch a runic dictionary, Su Er secretly used Geminio to copy her homework and disguised the duplicate as a book.
• Hermione returned, checked her homework, and believed Su Er had behaved himself.

Su Er and Hermione tested the Bluebell Flames spell and planned to sell bottles as hand warmers to buy Christmas presents. Su Er later found Harry at the Quidditch Pitch and learned he was Gryffindor's secret Seeker, while Harry offered to help him find George and Fred.

• Su Er and Hermione conjured Bluebell Flames, discovered they were gentle and warm, and discussed selling them to earn money for Christmas presents.
• Filch caught Su Er and Hermione leaving the classroom, so Hermione went to the Library to find the spellbook while Su Er searched for George and Fred.
• Su Er found Harry practicing at the Quidditch Pitch, where Wood questioned him before Harry identified him as a friend.
• Harry told Su Er that he was Gryffindor's Seeker and asked him to keep it secret; Su Er admitted he was looking for George and Fred.
• Harry offered to tell the twins that Su Er wanted to see them, then grew flustered as Gryffindors praised him for his upcoming Quidditch role.

Su Er arranged a late-night meeting with Fred and George to show them a product that could help fund their shop. He also watched Hermione deliver Neville’s pink note to Hannah, only to learn it was a message from Professor Sprout.

• After waking in the Hufflepuff Common Room, Su Er met Fred and George at dinner and proposed a business partnership.
• Fred and George agreed to meet Su Er at eleven that night after Quidditch practice to see his product.
• Hermione returned the rune book she had borrowed and agreed to keep it with her.
• Neville asked Su Er to deliver a pink note to Hannah, and Hermione eagerly took it instead.
• Hermione told Neville that Hannah had opened the note and that it was from Professor Sprout, not a love letter.

Su Er met George and Fred in the Hogwarts Kitchens and showed them how Bluebell Flames could be used in Warmth Bottles. They agreed to partner with Su Er and Hermione to make and sell the bottles.

• Su Er left the Hufflepuff dormitory late at night and saw Professor Kettleburn carrying a heavy bucket of fresh meat toward the stairs.
• A house-elf told Su Er that Professor Kettleburn had taken fresh meat from the kitchens.
• Fred and George arrived after a cold Quidditch practice and complained about Wood before joining Su Er.
• Su Er demonstrated that Bluebell Flames gave off warmth without harming anyone and explained that he and Hermione had found the spell in an old book.
• Su Er proposed that he and Hermione make the Warmth Bottles while Fred and George supplied bottles, advertised, and sold them, splitting the proceeds sixty-forty.
• Fred and George accepted Su Er's proposal and toasted their partnership.

Su Er, Fred, and George divided the profits from their Warmth Bottle business after sales began to decline. As Hogwarts prepared for the first Quidditch match, Hermione shared suspicions about Snape, and Harry tried to settle his nerves before his first game.

• Snape confiscated Harry's Warmth Bottle in Potions class and took five points from Gryffindor.
• Su Er met Fred and George with Hermione and learned they had sold 326 Warmth Bottles for 249 Galleons.
• Su Er gave Fred and George a hundred Galleons and asked them to exchange his Sickles for Galleons.
• Professor Flitwick taught the Bluebell Flames Charm, Seamus Finnigan turned it into an Exploding Charm, and Snape adapted it for precise potion heating.
• Hermione told Su Er that people suspected Snape of trying to reach the Three-Headed Dog and letting in the troll, while Su Er defended Snape.
• Before Gryffindor's match against Slytherin, Su Er and Seamus encouraged a nervous Harry to eat and keep his energy up.

Su Er discovered how to enter the Room of Requirement after spotting a black-robed figure use it, then returned to watch Harry's dangerous Quidditch match. Gryffindor won when Harry caught the Golden Snitch, while Su Er worried Hermione would get drawn into Dumbledore's upcoming trial.

• Su Er faked a stomachache to leave the Quidditch stands and went to the Seventh Floor to find the Room of Requirement.
• Su Er watched a black-robed figure walk back and forth three times before a doorway appeared, and he memorized the method.
• Su Er returned to the pitch and saw Harry's broom spin out of control while Quirrell recited a countercurse and Hermione set Snape's clothes on fire with Bluebell Flames.
• Hermione helped Harry regain control of his broom, and Su Er worried she would soon become involved in Dumbledore's trial.
• Harry caught the Golden Snitch, and Madam Hooch declared Gryffindor the winner.

Su Er visited Hagrid’s hut while Harry, Ron, and Hermione questioned Hagrid about the Philosopher’s Stone and the three-headed dog. After the others left, Su Er asked for unicorn hair to make Christmas gifts, and Hagrid generously gave him a bundle.

• Su Er admired the valuable magical materials in Hagrid’s hut and imagined making gifts from the unicorn hair.
• Hagrid ended Harry, Ron, and Hermione’s questioning about the three-headed dog and sent them out of the hut.
• Hagrid noticed Su Er and asked him to persuade Harry to stop investigating what the dog guarded.
• Su Er told Hagrid he wanted unicorn hair to make scarves for his sister, adoptive mother, Hermione, and Mrs. Granger.
• Hagrid gave Su Er a large bundle of unicorn hair and told him he could return for more, as long as he did not ask about the fourth-floor corridor.

Su Er searched for a way to soften unicorn hair so he could make scarves and hats, and asked Professor Snape for help. Snape gave him a clue, and Su Er gathered the ingredients and planned to use the Room of Requirement for the work.

• Su Er searched a library book for instructions on processing unicorn hair but found no useful method.
• Su Er went to Professor Snape's office and explained that he wanted to make scarves and hats from unicorn hair.
• Professor Snape initially ordered Su Er to leave, then quietly suggested using purple-leaf wood sorrel.
• Su Er worked out a soaking process for the unicorn hair and decided to use the Room of Requirement as a safe workspace.
• Professor Sprout gave Su Er three pots of purple-leaf wood sorrel, and he carried them back toward the Castle.

Su Er learned a Knitting Charm from Professor Flitwick and used the Room of Requirement to prepare materials and knit scarves. Hermione followed him there, but lost track of him when the room disappeared.

• Hermione asked Justin Finch-Fletchley where Su Er was, then Su Er asked Professor Flitwick to teach him a spell that could knit scarves automatically.
• Professor Flitwick taught Su Er the Knitting Charm, which had grown from house-elf household magic.
• Hagrid offered Su Er unicorn hair and puffskein fur, and Su Er went with him to collect the fur.
• Hermione spotted Su Er returning with a basket and secretly followed him to the Seventh Floor corridor.
• Su Er entered the Room of Requirement after wishing for a room to knit scarves, while Hermione watched the door vanish.
• Su Er cleaned the materials, ate a meal provided by the room, and successfully cast the Knitting Charm.