- "You must have thousands of questions, Baudelaires. I wish we had more time to talk, but it's already Tuesday. As it is you scarcely have time to eat your important brunch before getting into your concierge disguises and beginning your observations as flaneurs."
- —Kit meeting the Baudelaires
Before the Series
When Kit was four years old, the same age as the Denouement Triplets, the schism began in V.F.D. As she grew up, she played a major role in the Volunteer side of the schism. It is implied that she once was in a relationship with Count Olaf, but was also the object of Dewey Denouement's affections.
In The Grim Grotto, it is revealed that Kit assisted Captain Widdershins in the construction of the Queequeg. She and her brothers fought against Café Salmonella after the restaurant wiped out the fleet of V.F.D. salmon. Kit also wrote a letter to her friend Gregor Anwhistle, warning him about the danger of the Volatile Fungus Deportation program - do not use the poisonous mushrooms, Medusoid Mycelium. She is working on the way to dilute the poison at Opportune Odors Horseradish Factory on Lousy Lane.
According to Lemony Snicket's autobiography, she went to Prufrock Preparatory School disguised as a teacher (Ms. K), replacing Mr. Remora after he choked on a banana and retired. She had her students read books relating to V.F.D. Vice Principal Nero fired her when he read an article in The Daily Punctilio supposedly given to him by Mr. and Mrs. Spats, that forbade that particular list of books. When Nero informed her of his decision, Kit grabbed two orphaned students by the ankles and ran off, recruiting them into V.F.D. It is unknown who the students were or if they featured in the books at any point.
A Series of Unfortunate Events
The Carnivorous Carnival
Lemony Snicket breaks briefly from recounting the story to speak directly to his sister, telling her that he is still alive and searching for her. Her name is not mentioned.
The Slippery Slope
Though her name is once again not mentioned, Kit Snicket must be the addressee of Lemony Snicket's letter hidden in Chapter 5 of The Slippery Slope, as it is addressed to 'My dear sister'.
The Grim Grotto
The Penultimate Peril
At the start The Penultimate Peril, Kit is driving a taxi with the Baudelaires as her passengers. It is revealed that she was taking them to a meeting at Hotel Denouement where they will have brunch and she would give them their mission.
When they get out of the taxi, it is revealed that she is pregnant. The narration in chapter 9 implies she is the love interest and possibly even the wife of Dewey Denouement.
After Kit leaves the Baudelaires at the hotel, Lemony Snicket mentions Kit went to waterski towards Captain Widdershins, and later on, she waterskis away from him.
Between The Penultimate Peril and The End
After she left them at the Hotel Denouement, she met with Captain Widdershins and his stepchildren, Fiona and Fernald. Together they repaired his submarine and reached the Quagmires and Hector just as the self-sustaining hot air mobile home was wrecked by eagles and crashed into the submarine. Kit was injured when a telegram device fell on both of her legs. She made a raft, also known as a Vaporetto of Favorite Detritus, out of her various favorite books, but all of the others were either captured or rescued by the mysterious question mark-shaped object, "The Great Unknown". Kit somehow inexplicably crossed paths with the Incredibly Deadly Viper who kept her company on the raft.
Kit washes onto the coastal shelf with the Incredibly Deadly Viper near the island aboard the raft of books, unconscious and with both legs injured. Count Olaf attempts to disguise himself as Kit, but everyone else is able to see through it. When Kit regains consciousness, she informs the Baudelaires of the fates of the Quagmires, Fiona, Fernald, Captain Widdershins and Hector.
Like the islanders, Kit is poisoned by the Medusoid Mycelium. She refuses the apple as a cure because it will harm the baby as there's something in the hybrid that's bad for people who haven't been born yet.
Upon finding out that Kit Snicket is going into labor, Count Olaf carries Kit to where she can better-perform childbirth, thus performing what Violet calls the one good deed in his life (during which he surprisingly kisses Kit on the lips, hinting at a past relationship between the two).
Before she dies, Kit quotes an excerpt of a poem written by Francis William Bourdillon: "The night has a thousand eyes, and the day but one; yet the light of the bright world dies with the dying sun. The mind has a thousand eyes, and the heart but one: yet the light of a whole life dies when love is done."
Kit dies just before giving birth to her daughter, who is named after the Baudelaires' mother, Beatrice. Her grave is on the island where Ishmael facilitated. When visiting her grave, the Baudelaires often left flowers in her memory.
Although there are few illustrations of Kit, Brett Helquist drew Kit as having glasses and possessing light-colored hair, described as long and messy in the book. The shade may be interpreted as light brown, ginger orange or blonde. She also wears two pencils in her hair at odd angles, and seems to also have a comb in it on the cover of The Penultimate Peril.
On the cover of The Penultimate Peril, she appears to be wearing orange-and-blue Oriental/Asian clothing. However, in the book itself, it says she wears a very elegant black coat, buttoned up all the way to her chin, and tucked into the lapel was a flower that had seen better days, having lost most of its petals and wilted considerably.
She had a kind face, but there were lines of worry across her brow, and it looked like she hadn't slept properly for quite some time. If the Baudelaires had been asked to guess Kit's condition, they would have said she looked like a woman who had been through much hardship. On the cover of The Penultimate Peril, her cheeks are quite rosy.
- Count Olaf may have referenced her in the TV series. In The Miserable Mill: Part One, he says, "Did you ever know a woman who took your heart and rattled it like a baby in a cage? Who joined you for years on a sequence of heists and schemes until the two of you were forced apart by circumstance, and also because you ran off in the middle of the night with a bunch of her valuables?" However, it is also possible he means Georgina Orwell.
- There is a theory Jacquelyn may be Kit Snicket, as "Jacquelyn" is the feminine form of her brother's name, Jacques.
- Who Could That Be at This Hour? (Mentioned only)
- When Did You See Her Last? (only in a phone conversation)
- Shouldn't You Be in School? (Mentioned only)
- Why Is This Night Different from All Other Nights?
- File Under: 13 Suspicious Incidents (Mentioned only)
- The Carnivorous Carnival (Mentioned only)
- The Slippery Slope (Mentioned only)
- The Grim Grotto
- The Penultimate Peril
- The End
- Lemony Snicket: The Unauthorized Autobiography
- The Beatrice Letters (Mentioned only)
A Series of Unfortunate Events
All the Wrong Questions