OWNER OF THE DESK
Dewey Fairchild
Curious, methodical, entrepreneurial, hungry. Dewey's business grows from parent problems to teacher problems to sibling problems, while his own family keeps becoming evidence.
OPEN DEWEY'S FILE →CLARA'S PEOPLE DRAWER • ALL THREE BOOKS
Everybody has a file.
Friends. Family. Clients. Assistants. Dogs. Teachers. Siblings. People who agreed to surveillance before asking enough questions. Clara has been taking notes.
THE OFFICE
People who are supposed to be here.
ASSISTANT • POSSIBLY IN CHARGE
Clara Cottonwood
Wise, practical, quick-witted, experimental baker, field adviser, and the person most likely to tell Dewey when he is researching only the answer he wants.
OPEN CLARA'S FILE →CANINE DIVISION
Wolfgang von Fluff Bucket
Wolfie. Black-and-white Havanese. Field assistant, office greeter, companion, and frequent participant in Dewey's increasingly complicated operations.
OPEN WOLFIE'S FILE →FIELD TEAM
Friends who should probably ask more questions before agreeing.
FIRST CLIENT • RECURRING COLLABORATOR
Seraphina Johnson
Her parent problem helps launch the business. Across the series she becomes a friend, collaborator, researcher, and participant in plans involving everything from dentistry to school campaigns.
SERAPHINA'S FILE →BEST FRIEND • NARWHAL DEPARTMENT
Colin Decker
Funny, loyal, technically useful, and repeatedly willing to help Dewey gather evidence. In Book 3, Colin's drone work even helps create an entirely new sibling mystery.
COLIN'S FILE →THE FAIRCHILD HOUSE
The family is not merely background scenery.
Dewey's business is built around other people's family problems. By Book 3, his own parents and sisters are fully inside the case system—and eventually inside the secret office.
FATHER
Don Fairchild
Dewey's father. Family decisions and Don's own history become important evidence in the parent cases; Book 3 ends with Don finally entering Dewey's attic office.
DON'S FILE →MOTHER
Karen Fairchild
Protective, practical, family-focused, and one of the adults whose choices Dewey has to understand rather than merely oppose. She joins the final family descent into the office.
KAREN'S FILE →OLDER SISTER
Stephanie Fairchild
Stephanie gives Dewey a view from the older-sibling side: sometimes he is the one taking up somebody else's time and space. She discovers the office before their parents do.
STEPHANIE'S FILE →YOUNGER SISTER • POOH BEAR
Emma Fairchild
Pooh Bear helps Dewey understand a younger sibling's need for focused attention. She also keeps insisting that the secret office exists until the whole family finally sees it.
POOH'S FILE →AUNT • FAMILY ARCHIVE
Aunt Susie
Dewey asks about Don's childhood under cover of a school project. Susie supplies a clue—and a diary—that changes one of the earliest family cases.
SUSIE'S FILE →BOOK 3 • SIBLING CLIENTS
The people drawer got crowded.
The complete Sibling Problem Solver ingestion adds several family systems that Dewey has to observe rather than reduce to a single annoying sibling.
THOMAS FAMILY
Archie and Angelica
Archie's complaint about weekday electronics leads Dewey into gaming research and family-rule negotiation. The solution later produces a new social-media problem for his older sister Angelica.
BAUTISTA-KNICKERBOCKER FAMILY
Claire and Adam
Claire wants younger brother Adam to stop teasing and bothering her. Dewey's attempt to give them a common bicycle problem changes Adam's behavior and almost creates a real police problem.
DISK FAMILY
Efren and Louise
Efren wants space. Louise wants time with Efren. Dewey only sees the distinction after observing the family directly from a laundry-room stakeout.
CLARA'S SERIES PEOPLE DRAWER
39 people and animals currently filed.
Some people walk through all three books. Others belong to one case, one family, one classroom, or one extremely strange afternoon. Clara keeps the names connected.
BOOK 1 • BOOK 2 • BOOK 3
Clara Cottonwood
Dewey's ninety-four-year-old assistant returns at the opening, manages the office and backlog, helps Dewey frame sibling problems, and remains his principal adviser.
BOOK 1 • BOOK 2 • BOOK 3
Colin Decker
Colin remains part of Dewey's close friend group and increasingly uses the mini-drone for photography and observation, sometimes crossing Dewey's preferred case boundaries.
BOOK 1 • BOOK 2 • BOOK 3
Dewey Fairchild
Dewey begins Book 3 as an established problem solver, formally expands his work into sibling cases, and ends the book identifying problem solving as a craft rather than a paid service.
BOOK 1 • BOOK 2 • BOOK 3
Don Fairchild
Dewey's father is in his final semester of student teaching and remains an affectionate parent who regularly turns everyday moments into lessons.
BOOK 1 • BOOK 2 • BOOK 3
Emma Fairchild
Emma is Dewey's younger sister, called Pooh Bear. Her repeated discovery of and visits to the hidden office turn Dewey's sibling-problem work back onto his own family.
Also filed as: Pooh Bear • Pooh
BOOK 1 • BOOK 2 • BOOK 3
Karen Fairchild
Dewey's mother remains part of the Fairchild household routine, calls him Dewbert, manages family logistics, and ultimately learns the truth about the hidden office.
BOOK 1 • BOOK 2 • BOOK 3
Seraphina Johnson
Seraphina remains one of Dewey's closest friends; Book 3 recalls that her overprotective-parent case helped launch his reputation and shows her becoming friends with Elinor.
BOOK 1 • BOOK 2 • BOOK 3
Stephanie Fairchild
Stephanie is Dewey's older sister, academically driven and increasingly relevant to Dewey's effort to understand sibling boundaries and his own behavior as a brother.
BOOK 1 • BOOK 2 • BOOK 3
Wolfie
Wolfie is Clara's eighteen-pound canine companion and a constant part of office life, often providing comfort or comic interruption during client visits.
Also filed as: Wolfgang von Fluff Bucket
BOOK 3
Adam Bautista-Knickerbocker
Adam is Claire's younger brother, eighteen months younger and one school year behind her. He makes homemade films and repeatedly pranks or taunts Claire before the staged bicycle crisis turns him into her ally and protector.
BOOK 3
Angelica Thomas
Angelica is Archie's fifteen-year-old older sister. She becomes a client after the solution to Archie's case increases their mother's participation in family social-media activity and embarrasses Angelica online.
BOOK 3
Archie Thomas
Archie is a sixth grader whose complaint about a total weekday electronics ban becomes the first major case of Book 3 and eventually produces a family compromise around technology use.
BOOK 1
Aunt Susie
Don's sister supplies childhood information and a diary that reveal Don's long-abandoned ambition to teach math.
BOOK 2
Bailey Campos
Bailey asks Dewey for help after Mr. Snow's shark-heavy science instruction makes her and classmates afraid of water.
BOOK 2
Brad Snow
Brad Snow's shark-centered teaching unintentionally spreads fear; after Dewey's research and presentation he redesigns the learning experience around gradual contact with harmless sharks.
Also filed as: Mr. Snow
BOOK 2
Bryan Frenchie
Bryan's conflict with Mrs. Décorder becomes Dewey's first teacher problem and teaches the office to consider student responsibility as part of a teacher case.
BOOK 3
Charles Disk
Charles is Efren and Louise's father and Julie's co-client. He participates in household discipline, helps Dewey articulate the final case metaphor, and later offers to pay for Dewey's work.
BOOK 3
Claire Bautista-Knickerbocker
Claire becomes Dewey's first explicitly selected sibling-problem client. Her conflict with her younger brother Adam includes teasing, pranks, intimidation, and retaliation before Dewey engineers a shared problem that ultimately produces real sibling solidarity.
BOOK 1
Dr. Bernard
Dr. Bernard owns the dental practice where Don works and becomes an indirect source of information during Dewey's delegated workplace investigation.
BOOK 3
Efren Charles Disk
Efren is Louise's older brother. He wants privacy and space from her, refers his parents to Dewey while grounded, and becomes the target of Dewey's recommendation that focused attention can reduce later intrusion and retaliation.
Also filed as: Efren C. Disk • Efren Disk
BOOK 3
Elinor Mori
Elinor is a new student who moved from Washington to California, identifies herself as Jewish, has a Japanese-American father, and becomes part of Dewey, Seraphina, and Colin's friend group. She is a skilled artist with a strong interest in manga-style drawing.
BOOK 1
Georgina
Georgina asks Dewey to address her father's public burping and nose picking; the investigation eventually points toward medical causes rather than punishment.
BOOK 3
Julie Disk
Julie is Efren and Louise's mother and, with Charles, one of Dewey's first adult sibling-problem clients. She provides case access and later expresses satisfaction with Dewey's proposed solution.
BOOK 3
Louise Disk
Louise is Efren Disk's younger sister. Her letter and later behavior reveal that beneath repeated conflict and boundary violations she wants attention and time with her older brother.
BOOK 1
Michael de la Cruz
Michael asks Dewey for help because his mother's intense fear of germs has become intrusive and embarrassing.
BOOK 3
Mr. Bautista-Knickerbocker
Claire and Adam's father participates in family routines and nearly turns Dewey's staged bicycle plan into a real police report when he discovers the apparent theft and ransom note.
BOOK 3
Mr. Jordan
Mr. Jordan teaches Dewey and Elinor and uses conspicuous doorway signs to test whether students are paying attention to instructions about their math journals.
BOOK 2
Mr. Nisano
Mr. Nisano is initially experienced as monotonous and disengaging; after Dewey's deliberate-boredom experiment he begins changing his classroom presentation and layout.
BOOK 3
Mrs. Bautista-Knickerbocker
Claire and Adam's mother is present in the household routines Dewey observes during the sibling stakeout.
BOOK 2
Mrs. Décorder
Bryan's slow-speaking, highly digressive science teacher becomes the first teacher whose classroom Dewey treats as a formal case.
BOOK 3
Mrs. Johnson
Seraphina's mother appears as a supervising parent during the bowling outing and is also used by Dewey as evidence that his earliest parent-problem work produced lasting change.
BOOK 3
Naomi Thomas
Naomi is Archie and Angelica's mother. She initially enforces the weekday electronics ban, later participates in the family's revised technology routine, and eventually learns Minecraft from Archie after the social-media conflict with Angelica.
Also filed as: Mrs. Thomas
BOOK 2
Olivia Portapath
Olivia challenges the snack-garden intervention from the perspective of students who worked on the real garden and later joins the new conservation committee.
Also filed as: Olivia
BOOK 1
Peewee
Peewee is Seraphina's very large, friendly apricot-colored mastiff, introduced near the end of Book 1.
BOOK 2
Principal Mayoral
Principal Mayoral becomes the adult decision-maker at the center of the school conservation campaign, hearing student proposals while still enforcing school rules.
BOOK 3
Pumpkin
Pumpkin is the Disk family's orange-and-white tabby cat and briefly becomes Dewey's companion during the mudroom stakeout.
BOOK 2
Shawn
Well-liked custodian Shawn becomes an early clue that major school changes are coming and is treated by students as someone who often knows facilities news first.
BOOK 3
Tom Thomas
Tom is Archie and Angelica's father and part of the household whose electronics rules Dewey investigates.
BOOK 2
William Sanai
William asks Dewey to solve an unbearably boring Humanities class and becomes the student who delivers the line that makes Mr. Nisano reconsider his teaching.
THE DRAWER IS OPEN
Parent, Teacher, and Sibling Problem Solver are all filed.
The public people layer now draws from the complete book-level world files for all three novels. Source-grounded facts can continue to expand individual character pages without replacing the page-by-page archive underneath them.
OPEN ANOTHER DRAWER
Same office. Different drawer.
Cases, chronology, people, connections, places, objects, snacks, sayings, and Clara's search cabinet are different ways into the same Book 3 file.