Chapter Summaries

Su Er received a bronze badger from Lisi and learned that a third identical one was waiting to be found. After leaving the Forbidden Forest, he accidentally nibbled Hermione’s hand and ended the day facing his roommates’ playful threat.

• Su Er opened the box and recognized the bronze badger as identical to the one in his dormitory.
• Lisi told Su Er that a wizard had prepared three matching objects and asked him to bring all three to her once he found the third.
• The Bowtruckle tugged Su Er’s ear and led him through the Forbidden Forest as he visited the Bowtruckles with Doxy eggs.
• Su Er sat down beside Hermione at dinner and absentmindedly kissed and nibbled her hand, making her blush and smack him.
• Justin and Morn teased Su Er about Hermione’s hand, then agreed they should get him.

Su Er searched for clues to Helga Hufflepuff’s missing badger figurine and planned to ask Amelia and Dumbledore for help. On Hogsmeade Weekend, Harry stayed behind while Su Er and the others prepared to leave, and Filch arrived with a stack of lists.

• Su Er suspected that the third badger figurine was hidden somewhere in Hogwarts and decided to write to Amelia and search the Library before asking Dumbledore.
• After the Dementors left and the rain cleared, the third-year students gathered in the Entrance Hall for Hogsmeade Weekend.
• Ron brought Scabbers along because he feared Crookshanks would attack him, while Harry accepted that he had to stay behind and asked his friends to bring him sweets.
• Neville arrived wearing new clothes that smelled strongly of fragrant grass, and Su Er used spells to lessen the odor.
• Filch came into the Entrance Hall carrying a stack of long lists.

Su Er encouraged Neville to ask Hannah to tea, then demonstrated by inviting Hermione to spend Hogsmeade weekend with him. After shopping and sampling sweets together, Su Er and Hermione arrived at Madam Puddifoot’s Tea Shop.

• Neville thanked Su Er for helping reduce the smell on him, and Su Er urged him to invite Hannah to tea before she went shopping.
• Su Er recalled Amelia’s letter confirming that the badger ornament had come from a Diagon Alley shop, increasing his suspicion that another ornament was in Hogwarts Castle.
• At Hogsmeade, Su Er invited Hermione to sample treats, and she accepted while Hannah and Susan teased them.
• Su Er accompanied Hermione to Scrivenshaft’s Quill Shop, Gladrags Wizardwear, and Honeydukes, where they bought items and tried novelty sweets.
• Su Er and the tired Hermione entered Madam Puddifoot’s Tea Shop together.

Su Er and Hermione visited Madam Puddifoot's Tea Shop, where they spotted Percy meeting Penelope Clearwater and Hermione discovered Su Er had secretly recorded something with a Remembrall. Hermione questioned him over the recording, and the chapter ended when Neville Longbottom and Hannah Abbott entered the shop.

• Madam Puddifoot seated Su Er and Hermione in a quiet corner and recommended tea and chocolate cookies.
• Su Er and Hermione saw Percy meet Penelope Clearwater, confirming George and Fred’s guess that they were dating.
• Hermione stopped Su Er from recording Percy and Penelope, then examined the Remembrall and found its images.
• Su Er insisted he had left the Remembrall in the Room of Requirement by accident, while Hermione pressed him about what it had recorded.
• Hermione asked whether Su Er was the only person who had seen the recording, and his answer revealed that he had watched it.
• Neville Longbottom and Hannah Abbott entered the tea shop as Hermione sat quietly with Su Er.

Su Er and his friends returned from Hogsmeade and attended Hogwarts’ Halloween Feast. The feast ended cheerfully, with the Dementors’ gloom seeming to lift for the day.

• Su Er teased Neville about inviting Hannah to Madam Puddifoot’s Tea Shop while Ron told them about his day in Hogsmeade.
• Ron revealed that Scabbers was still sleeping in his pocket and felt left out when he learned Su Er, Hermione, Neville, and Hannah had spent the afternoon at the tea shop.
• Su Er used magic to clean the Entrance Hall floor after Filch struggled with prank stains left by the Weasley brothers.
• Su Er joined his dormmates in the Great Hall, where floating pumpkins, blue flames, and conjured bats decorated the Halloween Feast.
• The ghosts performed for the students, and Dumbledore and McGonagall chatted as the feast ended on a happy note.

Peeves announced that Sirius Black had attacked the Fat Lady’s portrait, and Dumbledore kept the students in the Great Hall while the staff searched the Castle. Su Er joined Hermione, Harry, and Ron for the night, reconciled with Hermione, and realized that Scabbers’ presence meant Black had failed to find his target.

• Peeves told Dumbledore that Sirius Black had damaged the Fat Lady’s portrait and that she was hiding on the fifth floor.
• Dumbledore sent McGonagall to Gryffindor Tower and Filch to find the Fat Lady, then ordered the students to remain in the Great Hall overnight.
• Dumbledore conjured sleeping bags, and Percy organized the students and the prefects to guard the Hall.
• Su Er joined Hermione, Harry, and Ron, apologized to Hermione, and persuaded her to forgive him.
• Ron said he had brought Scabbers with him, and Su Er inferred that Black had come away empty-handed.

Su Er tested his theory that Sirius Black was hiding in the Room of Requirement, while students debated how Black had entered Hogwarts. The chapter ended with Su Er setting a concealed recording device near the room and Harry sitting silently in the library.

• Su Er overheard Dumbledore and Snape discuss Black’s disappearance and heard Dumbledore promise that no Dementor would enter the castle.
• Su Er found that the Room of Requirement did not appear, which led him to suspect Black was hiding inside it.
• Su Er concealed an activated Remembrall near the Room of Requirement to record whoever was inside.
• Hannah, Neville, Ron, and Hermione debated how Black had entered Hogwarts in the library, until Madam Pince stopped their discussion.
• Harry stared blankly at his parchment while the other students returned to studying.

Su Er used the Remembrall to confirm that Sirius Black had been hiding in the Room of Requirement, then planned to use the Marauder's Map to track Peter Pettigrew and arrange for him to be caught. He persuaded George and Fred to take him to Hogsmeade, leaving Harry and Hermione alarmed by his joking explanation.

• Su Er watched the Remembrall's recording and saw Black emerge from a hidden door in the Castle as a black dog.
• Su Er considered showing Dumbledore the evidence, but decided to wait for a chance to catch Peter Pettigrew and clear Black's name.
• Su Er decided to borrow the Marauder's Map from George and Fred so he could monitor Peter's movements.
• Su Er persuaded George and Fred to take him to Hogsmeade after dinner by implying he had a secret reason to go.
• When Harry asked what he planned to do, Su Er joked that he would blow up Hogwarts with Ron's brothers, shocking Harry and Hermione.

Su Er met Fred and George to learn how they had secretly traveled to Hogsmeade, and they revealed the Marauder’s Map. They gave it to him, and the three set off to use one of its secret passages.

• Ron believed Su Er’s story, but Harry and Hermione realized Su Er had been joking about his plan.
• Su Er met Fred and George in a hidden room, where they explained how they had found the Marauder’s Map in Filch’s office.
• Fred showed Su Er how to activate and clear the map, and the brothers explained its secret passages and routes to Hogsmeade.
• Fred and George gave the Marauder’s Map to Su Er, who promised to pass it on to Harry when he no longer needed it.
• Su Er, Fred, and George set off for Hogsmeade through one of the map’s passages.

Su Er bought sweets and joke products with Fred and George in Hogsmeade, then joined them for Butterbeer before they returned to Hogwarts after curfew. The three parted ways in the corridor, leaving Fred and George worried as a tipsy Su Er staggered off alone.

• Su Er bought sweets at Honeydukes, then paid for Fred and George’s joke products at Zonko’s and called the purchase research funding.
• Fred and George told Su Er they planned to buy alcohol at the Hog’s Head and hoped to learn where Hagrid’s Acromantulas were so they could sell venom.
• Su Er agreed to join their Acromantula venture, and Fred and George bought hot Butterbeer for the three of them.
• After curfew, Su Er tried to use the Marauder’s Map without his wand, and George pointed out his mistake.
• Fred used the map to confirm Filch was in his office, then watched as Su Er staggered away with his sweets while Fred and George hoped Merlin would watch over him.

Su Er used the Marauder's Map and found the name Peter Pettigrew in the Gryffindor Common Room, though he could not identify who it belonged to. During the rain-soaked Quidditch match between Hufflepuff and Gryffindor, Hermione said she had never heard of a student named Pettigrew, and Su Er left his explanation for later.

• Su Er woke up hungover, remembered the Marauder's Map, and searched it while alone in the dormitory.
• Su Er found no Peter Pettigrew on the map except for a name in the Gryffindor Common Room, then hid the map when Justin and Morn returned.
• Su Er watched the Hufflepuff-Gryffindor Quidditch match from the Gryffindor stands as Madam Hooch started the game in heavy rain.
• Su Er asked Hermione whether she knew a Gryffindor named Peter Pettigrew, and Hermione said she had never heard of anyone with that surname.
• Su Er told Hermione he would explain where he had heard the name after the match, as Gryffindor celebrated Wood's opening goal.

During the rain-soaked Quidditch match, Dementors invaded the pitch and attacked the players, prompting Su Er, Professor McGonagall, and Dumbledore to drive them back with Patronuses. Harry lost consciousness and fell from his broom, and Dumbledore raised his hand toward him as he dropped.

• Gryffindor scored repeatedly against Hufflepuff, while Cedric searched the sky for the Golden Snitch.
• Lee Jordan announced that Cedric had spotted the Snitch, and Harry also saw it and sped after it.
• Dementors descended on the pitch, spreading despair among the spectators and players.
• Su Er cast a Patronus that drove back the Dementors in the clouds, then used his badger Patronus against one rising toward the stands.
• Professor McGonagall and older students cast Patronuses as Dementors closed in on Harry.
• Dumbledore sent a large bird-shaped Patronus to destroy the Dementor attacking Harry, who then fell unconscious from his broom as Dumbledore raised his hand toward him.

After Harry survived the Dementors’ attack, Cedric caught the Golden Snitch and Hufflepuff won the match. Su Er questioned Percy about Peter Pettigrew, promised Hermione he would teach her the Patronus Charm, and learned that Harry’s Nimbus 2000 had been wrecked by the Whomping Willow.

• Magic slowed Harry’s fall, and Madam Hooch declared Hufflepuff the winner after Cedric caught the Golden Snitch.
• Professor McGonagall carried Harry to the Castle while Su Er asked Percy whether he knew Peter Pettigrew; Percy recalled an old trophy bearing that name.
• Hermione asked Su Er to teach her the Patronus Charm, and he agreed to teach her in a few days.
• Ron showed Su Er a piece of Harry’s Nimbus 2000, which he had found near the Whomping Willow, then said he had spent the previous night in the dormitory with Harry.

After Hufflepuff celebrated its Quidditch victory, Su Er found Sirius Black near the passage beneath the Whomping Willow on the Marauder’s Map and set out to confront him. On his way, Professor Flitwick invited Su Er to share his Patronus experience at a club meeting and mentioned Su Er’s mother.

• Su Er checked the Marauder’s Map and saw that Peter Pettigrew remained in Gryffindor while Sirius Black appeared near the Whomping Willow.
• Su Er recalled the danger Black’s arrival had posed to the students during the Dementor attack and angrily left the Hufflepuff Common Room to find him.
• Cedric congratulated Su Er on Hufflepuff’s victory as Su Er hurried out of the common room.
• Professor Flitwick stopped Su Er near the Whomping Willow and invited him to discuss casting the Patronus Charm at his club’s next session.
• Professor Flitwick said he was going to the Hospital Wing to return Harry’s broom fragments and told Su Er that his mother would have been proud of his talent.

Su Er used Transfiguration to bypass the Whomping Willow and followed the secret passage to the Shrieking Shack, where he prepared to confront Mr. Padfoot. He disguised his face and silenced his voice before reaching for the door behind which he expected the fugitive to be waiting.

• Su Er distracted the Whomping Willow with two transfigured cats, touched its hidden knot, and entered the passage in its trunk.
• Su Er transformed into a badger and followed the passage toward the Shrieking Shack, detecting Professor Lupin's scent and signs that Mr. Padfoot had been there.
• Su Er entered the Shack and found the empty room where Professor Lupin had transformed, then realized Mr. Padfoot was likely behind a closed door.
• Su Er changed back into human form, concealed his face, and used a spell to silence his voice.
• Su Er gripped his wand and reached for the door handle, ready to confront Mr. Padfoot.

Su Er captured Sirius Black in the Shrieking Shack, forcing him out of his Animagus form and identifying himself as a Hufflepuff student. Black asked whether Su Er planned to hand him over to the Aurors for the bounty or fame.

• Su Er anticipated Sirius Black’s attack in dog form and knocked him back with Flipendo.
• Su Er transfigured a box into ropes, bound Black, and used Incarcerous to secure him further.
• When Black kept barking and resisting, Su Er beat him and threatened him with a green spell until he returned to human form.
• Black asked who Su Er was, deduced he was a Hogwarts Hufflepuff student, and asked whether he would hand him over to the Aurors for the bounty or fame.

Su Er confronted Sirius Black in the Shrieking Shack, claiming Dumbledore was arranging to catch Peter Pettigrew and reprimanding Black for endangering Hogwarts students. After beating Black without seriously injuring him, Su Er left him food and told him to stay hidden while the plan unfolded.

• Su Er kept Black restrained, explained that the Marauder's Map had led him to the Shrieking Shack, and claimed Dumbledore had sent him.
• Su Er told Black that Pettigrew had not been caught yet and that Black could not be cleared until he was found.
• Su Er rebuked Black for the Dementors' attack on the Quidditch pitch, which had nearly harmed Harry and other students.
• Su Er used conjured sticks to beat Black, recorded the incident with a crystal ball, and left him bread and water.
• Black thanked Su Er as he turned to leave.

After returning to Hufflepuff’s common room, Su Er removed his face-and-voice disguise and prepared to seek Dumbledore’s support, carrying evidence about Black. He reached the Headmaster’s Office just as Cornelius Fudge and Dawlish were leaving.

• Su Er frightened a young Hufflepuff witch by emerging from the secret passage still disguised, then removed the spells and apologized to her and the gathered students.
• Su Er ate in the common room and gathered Cockroach Clusters, Jelly Slugs, the Marauder's Map, and the Remembrall before going to see Dumbledore.
• Su Er guessed several sweets as the gargoyle’s password before correctly naming Toad Mint Ice Cream and entering the Headmaster’s Office staircase.
• Cornelius Fudge and Dawlish emerged from Dumbledore’s office, and Fudge politely told Su Er that Dumbledore was inside.

Su Er told Dumbledore how he had traced Sirius Black to the Shrieking Shack and learned that Peter Pettigrew had betrayed Harry’s parents. He laid out evidence that Pettigrew was hiding as Ron’s rat, Scabbers, leaving Dumbledore to consider the case against Black anew.

• Su Er showed Dumbledore the Marauder’s Map and explained that Fred and George had given it to him.
• Su Er described how a Remembrall recorded Sirius Black leaving the Room of Requirement and said he had found Black hiding in the Shrieking Shack.
• Su Er explained that Black claimed Peter Pettigrew had betrayed Harry’s parents and faked his death in the street explosion.
• Su Er told Dumbledore that Black escaped Azkaban after seeing Pettigrew in the Weasleys’ Egypt photograph.
• Su Er argued that Ron’s rat, Scabbers, was Pettigrew because Scabbers had lived for ten years and was missing a finger.
• Dumbledore acknowledged the possibility that Pettigrew had used his Animagus form to hide in a wizarding family.

After arranging a plan with Dumbledore to trap Peter Pettigrew, Su Er entered the strange white realm again and tried casting the Patronus Charm. The spell drained his magic until he collapsed, while his glowing body floated above his bed and alarmed Hufflepuff.

• Su Er and Dumbledore planned a Tom and Jerry performance to expose Peter Pettigrew, with Dumbledore arranging the roles and audience for the following weekend.
• Su Er returned to the white realm and suspected that casting the Patronus Charm had brought him there.
• Su Er cast Expecto Patronum without his wand, and silver threads gathered as the spell rapidly drained his magic.
• Su Er lost consciousness and collapsed while the Patronus Charm continued, surrounding him with bright silver light.
• Morn saw Su Er floating and glowing above his bed, woke Justin, and the Hufflepuff prefect went to summon Severus Snape.