Morrigan is a 13-year-old Wundersmith with a square jaw, thick black hair, and a tendency to look as though she is about to snarl. Raised in the Wintersea Republic under the belief she was cursed to die, she now adapts to life in the Free State as a member of the elite Wundrous Society. She is fiercely protective of her friends and eager to master her rare ability to manipulate the magical energy known as Wunder.

Cadence is a confident, straightforward student with the Wundrous talent of mesmerism, allowing her to influence minds or blend invisibly into the background. Inspired by mystery novels, she appoints herself lead detective when a murder occurs in the Silver District, organizing her classmates to track down clues.

Squall is a banished and notorious Wundersmith who previously murdered his peers and was exiled from Nevermoor. He now acts as Morrigan's secret mentor, communicating through energy projections and shadowed riders. He refuses to coddle her, insisting that she face the dangerous realities of wielding Wunder.

Margot is the eldest of the Darling daughters and a prominent figure in the wealthy Silver District. She acts as a polished, welcoming host when Morrigan arrives at Darling House. She is intensely focused on maintaining her family's status and financial security among the Great Houses.

Jupiter is the eccentric proprietor of the Deucalion Hotel and a captain in the League of Explorers. As a Witness, he can see emotional energy and invisible forces, a trait that requires him to wear an eyepatch to avoid sensory overload. He serves as Morrigan's patron and guardian, fiercely dedicated to keeping her safe from harm.

Hawthorne is an enthusiastic and highly skilled dragonrider from a working-class background. As one of Morrigan's closest friends, he provides steadfast loyalty and a sense of humor. He dreams of competing in the prestigious Winter Trials against riders from much wealthier families.

The matriarch of the Grand Old House of Darling. She is frequently unwell, keeping strictly to her private rooms while the rest of the family manages social obligations. Her cold and unapproachable demeanor makes Morrigan feel entirely unwelcome during her first visit to the Silver District.

Modestine is Morrigan's youngest aunt, a seemingly carefree woman preparing for a lavish high-society wedding. She furnishes Morrigan with an elegant peach gown that once belonged to her mother, hoping to integrate her niece into the family.

One of Morrigan's aunts residing in the Silver District. She participates in the family's endless cycle of social entertainments and helps prepare Morrigan for her official debut into their society.

Tobias is Aunt Margot's husband. Coming from outside the Silver District, he had to abandon his career in the publishing industry to marry into the Darling family, as the district's elite look down on those who work for a living.

Dario is a celebrated dragonrider from the wealthy Rinaldi family. His sudden murder on his wedding day shocks the Silver District and prompts Morrigan and her friends to launch an investigation.

Lottie is the twin sister of Louis and the daughter of Laurent St. James. Despite her father's political hostility toward Morrigan, Lottie treats her warmly, eagerly sharing gossip about the Silver District elites and teaching her about hidden portals called lintels.

Louis is Lottie's twin brother. He shares her penchant for breaking rules and exploring the boundaries of the Silver District via magical lintel chains, ignoring their father's strict political instructions.

A resident of the Free State and a former member of Jupiter North's Wundrous Society unit. He operates mechanical spider vehicles similar to the one Jupiter uses and holds a deep, vocal disdain for the wealthy families of the Silver District.

Cosimo is Dario's tight-lipped brother. He is sometimes mockingly referred to as the "Ogden Town Dario" by snobbish members of the Silver District, suggesting he is viewed as a lesser version of his glamorous brother.

Dario's 11-year-old sister. She uses a mechanical eight-legged chair named Spiderlily to navigate the world and possesses a deep interest in dragonriding despite her family's protective instincts.

Born Georgette Devereaux, she is a disgraced member of the Silver District who ran away to become a musician. Her family views her paid work as a deep source of shame, refusing to acknowledge her publicly.

A resident of the Silver District and former competitor who failed to make the cut for Unit 919. She remains highly resentful of Morrigan and firmly believes that outsiders do not belong in her wealthy neighborhood.

Morrigan's deceased mother. Born into the wealthy Darling family, she famously ran away to the Wintersea Republic, an act that her family considered treasonous. Her legacy is heavily dramatized in the Silverborn Saga books.

Morrigan's estranged father. He is a prominent politician in the Wintersea Party who considered his daughter cursed before her escape to the Free State.

The leader of the Concerned Citizens of Nevermoor and a vocal opponent of Wundersmiths. He publicly demands that Morrigan be sent back to the Wintersea Republic, creating political tension throughout the city.

Jupiter's pragmatic nephew. He lives at the hotel while his parents are missing off-realm, and he harbors ambitions to join the League of Explorers so he can search for them himself.

A student in Unit 919 with an exceptional talent for languages. He aids his classmates by translating difficult texts and attempting to communicate directly with Wunimals and dragons.

A gastronomist in Unit 919 whose specially prepared foods can inspire specific emotions in whoever eats them. He provides comfort and practical culinary assistance to his friends.

Often called Lam, she is a royal member of Unit 919 hailing from the state of Far East Sang. Her keen strategic mind allows her to solve complex logistical problems that stump even the adult leaders of the Wundrous Society.

A combative and highly physical student in Unit 919. Her assigned civic task involves teaching self-defense to senior citizens.

An aspiring surgeon in Unit 919 who poses as a healer at the Children's Hospital for her civic task. She aids Cadence's murder investigation by applying tropes she learned from reading the Silverborn Saga mysteries.

Often called Arch, he is a member of Unit 919 with exceptional pickpocketing and lock-picking skills, which become highly useful during the group's covert operations.

A public relations official for the Wundrous Society. She attempts to manage Morrigan's public image by arranging high-profile meetings to make her seem less threatening to the general public.

An overzealous wedding planner hired for Modestine's nuptials. Because he is an outsider in the Silver District, the local authorities immediately arrest him when the groom is murdered.

A large, talking Magnificat who serves as head of housekeeping at the Hotel Deucalion. She provides blunt, sarcastic commentary on the daily lives of the hotel residents.

An enormous, squid-like creature created by a past Wundersmith. It consumes guilt, typically feeding on the Unresting spirits collected during the Black Parade, and poses a massive threat to the city if left hungry.

A highly valuable and beautiful dragon owned by the Rinaldi family. Its poor performance and erratic behavior at the Winter Trials becomes a major point of concern for the characters.