Trixie Belden - amateur detective. Her real name is Beatrix which she despises. When the series started, she was thirteen going on fourteen. Her age became fixed at fourteen. She's quick-tempered, smart, but not fond of schoolwork.
Full name: Beatrix Belden
Birthday: May 1.
Relations: Peter and Helen (Johnson) Belden , parents
Brian, Mart, and Bobby Belden, siblings
Andrew Belden, uncle
Harold Belden and wife, uncle and aunt
Cap, Knut, and Hallie Belden, cousins
Aunt Alicia
Interests: Horses, solving mysteries, loves Lucy Radcliffe spy novels. Hopes to be a detective.
Also: Her favorite horse is Susie.
Honey Wheeler - Trixie's very best friend. She's pretty, very sweet, an excellent swimmer, and the daughter of wealthy parents. Her home is Manor House, neighboring Crabapple Farm.
Full name: Madeleine G. Wheeler
Birthday: ?
Relations:
Matthew and Madeleine (Hart) Wheeler, parents
Jim Frayne, adoptive brother
Ben Riker, cousin
Anne and Gregory Hart, distant cousins
Interests: Sewing, solving mysteries. Hopes to be a detective.
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Jim Frayne - Handsome red-haired adopted brother of Honey. Jim was introduced in the very first book The Secret of the Mansion. He is the boy Trixie most admires and the admiration is mutual.
Full name: James Winthrop Frayne II
Birthday: In July
Relations:
Matthew and Madeleine (Hart) Wheeler, adoptive parents
Honey Wheeler, adoptive sister
Juliana Maasden Vorwald, cousin
Winthrop Frayne and Katje Vanderheiden, parents (deceased)
Jones "Jonesy", stepfather
James Winthrop Frayne I and wife Nell , great-uncle and aunt (deceased)
Interests: The outdoors, horses. Hopes to open a boys' school.
Also: Usually rides Jupiter.
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Brian Belden - Trixie's oldest brother. He's dark-haired and handsome and dreams of becoming a doctor. He's the sensible sibling. We finally meet him and Mart in #3 The Gatehouse Mystery.
Full name: Brian Belden
Birthday: October 22.
Relations: Peter and Helen (Johnson) Belden, parents
Mart, Trixie, and Bobby Belden, siblings
Andrew Belden, uncle
Harold and Belden, uncle and aunt
Cap, Knut, and Hallie Belden, cousins
Aunt Alicia
Interests: Science, his car. Hopes to be a doctor.
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Mart Belden - Trixie's older brother by a mere 11 months that he lords over her. He hates being told he and she look alike. He also has a fondness for big words. He first appears in #3, along with Brian. They were away at camp in #1 and #2.
Full name: Martin Belden
Birthday: June 1.
Relations: Peter and Helen (Johnson) Belden, parents
Brian, Trixie, and Bobby Belden, siblings
Andrew Belden, uncle
Harold and ? Belden, uncle and aunt
Cap, Knut, and Hallie Belden, cousins
Aunt Alicia
Interests: Language, gastronomy, and agriculture. Enjoys Cosmo McNaught sci-fi novels. Hopes to have an agricultural career.
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Diana Lynch - Nickname is "Di". She was introduced in #4 The Mysterious Visitor, though her name was mentioned in #2 The Red Trailer Mystery. Di is a dark-haired, violet-eyed beauty -- "the prettiest girl in school". Her family is newly rich and she has felt like an outsider until she is befriended by Trixie and the gang.
Full name: Diana Lynch
Birthday: In August.
Relations:
Mr. and Mrs. Lynch, parents
Larry and Terry*, Six-year-old twin brothers
Twin baby sisters, names unknown
Montague "Monty" Wilson, maternal uncle
Interests: Art and drama.
Also: Diana's horse is a palomino named Sunny.
*Terry was mistakenly named Jerry in one of the books.
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Dan Mangan - Dan was introduced in #8 The Black Jacket Mystery as a sort of juvenile delinquent. He is the nephew of Regan, the Wheelers' groomsman. The gang befriended him, helped him out of trouble and he became the last member of the Bob-Whites. Because Dan has to work hard, he doesn't get to go along on all the trips (poor fellow), so he barely appears in many of the books. He lives with Mr. Maypenny, the Wheelers' gamekeeper.
Full name: Daniel Mangan
Birthday: ?
Relations: Tim and ? (Regan) Mangan, parents (both deceased)
Bill Regan, maternal uncle
Interests: Hopes to be a police officer.
Also: Dan's horse is Spartan. Used to be a member of a gang called The Cowhands.
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The Bob-Whites of the Glen - Trixie and her friends started this club in #3 The Gatehouse Mystery. They have their own jackets which are red with white lettering. They use the bob-white bird whistle as their signal (taught to them by Jim). The main purpose of the club is to help others (while having fun). The seven members are: Trixie, Honey, Jim, Brian, Mart, Di, and Dan. Diana joined the club after #4 The Mysterious Visitor, and Dan became a member after #8 The Black Jacket Mystery.
In #6 The Mystery in Arizona, we get this suggestive passage about Bob, Billy, and Sally Wellington:
"The Wellingtons were swell kids, Trixie thought. Why, it was almost as though they were Bob-Whites. Maybe someday they would become members."
After they promise to visit each other, Trixie shares her thought with them.
This was the last book written by Julie Campbell. Perhaps, if she had continued, the Wellingtons would have become Bob-Whites. As it is, they never made another appearance.