Charlie is a ten-year-old boy who discovers he possesses the supernatural ability to hear conversations captured in photographs. This revelation forces him out of ordinary life and into Bloor's Academy, an imposing school for gifted children. Despite the manipulative pressures of his magically endowed family, he remains loyal, brave, and determined to use his new talent to find a missing girl.

Emma is a girl whose inventor father traded her away to the powerful Bloor family when she was a baby. Her disappearance forms the core mystery Charlie attempts to solve during his first term. Endowed with the ability to fly and exceptionally talented at art, she longs for a loving home to replace her cold upbringing.

Paton is Charlie's reclusive great-uncle and the only supportive adult living in the Yewbeam household. He spends his time isolated in his room writing a family history, avoiding the outdoors because his intense emotions cause nearby lightbulbs to brighten and shatter. Though initially passive regarding his sisters' cruel schemes, he gradually finds the courage to assist Charlie.

Manfred is the seventeen-year-old head boy at Bloor's Academy and a descendant of the school's founders. He is tall and narrow-faced with coal-black eyes that he uses to exercise his dark endowment: hypnotizing others into permanent or temporary trances. He acts as the primary enforcer of the academy's oppressive rules and the Yewbeam family's schemes.

Benjamin is Charlie's unendowed best friend who lives across the street. Small with dirty blond hair, he relies on his ordinary life and his private-detective parents to provide Charlie with an anchor to the non-magical world. He enthusiastically helps Charlie hide important artifacts from the prying eyes of the Yewbeam sisters.

Billy is a seven-year-old orphan and the youngest child at Bloor's Academy. His albinism, marked by pale skin and red eyes, makes him immune to hypnosis but also singles him out for bullying. Desperate for love and a permanent family, he dreads the long weekends he spends completely alone at the school.

Grizelda is Charlie's authoritarian paternal grandmother and the eldest of the Yewbeam sisters. Although she lacks magical endowments, she strictly enforces the ancient rules of her powerful lineage. She uses her financial leverage over Charlie's household to dictate his future, forcing him into Bloor's Academy.

The second eldest Yewbeam sister, Lucretia works as the matron at Bloor's Academy. This position allows her to act as her family's spy, directly monitoring Charlie and his friends within the imposing walls of the school. Like Grizelda, she is unendowed but fully supports the family's cruel methods.

Eustacia is one of the endowed Yewbeam sisters, possessing the gift of clairvoyance. She uses her visions of the future to track Charlie's developing powers and eventually poses as a social worker to locate a hidden artifact.

The youngest Yewbeam sister is striking and vain, retaining her dark hair unlike her older siblings. She is endowed with the ability to create enchanted clothing, an ability she uses to craft dangerous garments designed to ensnare or track her family's enemies.

Charlie's mother is a kind but financially trapped woman who lost her husband, Lyell, under mysterious circumstances years ago. She despises the Yewbeam family's control over her life but complies with their demands out of fear and the necessity of providing for her son.

Charlie's maternal grandmother provides a grounded, pragmatic presence in his home. She frequently grumbles about her intimidating in-laws but cannot overcome the financial reality that keeps her family bound to them.

Charlie's father is an organist who went missing when Charlie was two years old. He defied his ancient bloodline by marrying outside the magical families and attempted to intervene when the Bloors committed a terrible wrong at the local cathedral.

Fidelio is a lively, musically gifted student from a large, boisterous family. He acts as Charlie's guide to Bloor's Academy, offering him immediate friendship and logistical help in hiding dangerous objects from the school's staff.

Olivia is an unendowed drama student at Bloor's Academy who quickly allies herself with Charlie. She proves brave and insightful, volunteering to keep watch over vulnerable students and mapping out the school's confusing layout to help her friends avoid capture.

Gabriel is an endowed student who possesses the ability to read the history and emotions attached to items of clothing. Though initially timid about returning Charlie's haunted cape, he uses his powers to reveal crucial information about Charlie's missing father.

Julia is a regretful bookshop owner who has spent years searching for the niece she failed to protect. She gives Charlie a heavy, locked silver case tied to the girl's past, begging him to keep it safe from the Bloors.

Mr. Onimous is a strange, friendly man who travels with three magical cats. He notices the mysterious photograph in Charlie's house and encourages the boy to investigate the missing baby, providing crucial early guidance.

Aries, Sagittarius, and Leo are three brightly colored, magical cats. Originally the leopard companions of the ancient Red King, they operate in secret to protect and guide his good-hearted descendants in the modern era.

Dr. Tolly is a brilliant inventor who made a tragic mistake by trading his infant daughter to the Bloor family. Before disappearing, he created a mechanical artifact designed to counteract the hypnosis placed upon his child.

The headmaster of Bloor's Academy is a cold, authoritative figure who orchestrates the suppression of the endowed students. He works alongside his son, Manfred, to ensure that the dark secrets of the academy remain hidden from the outside world.

The decrepit, elderly patriarch of the Bloor family operates from the shadows of the academy. He targets the most vulnerable students, using false kindness and promises of adoption to turn them into spies.

Asa is Manfred's cruel henchman at Bloor's Academy. Endowed with the ability to transform into a beast-like creature, he physically intimidates younger students and hunts those who defy the school's harsh rules.

Runner Bean is Benjamin's large, loyal dog, sharing his owner's dirty blond coloring. He is highly sensitive to magical threats and fiercely defends Benjamin and Charlie from supernatural stalkers.

The academy cook's aging dog serves as Billy Raven's only consistent company on lonely weekends. Because Billy can understand animal thoughts, Blessed inadvertently leads the boy into an encounter with the sinister Ezekiel Bloor.

Lysander is an endowed student who possesses the power to summon ancestral spirits. He uses his abilities to fend off monstrous attackers and protect his friends when the academy's teachers refuse to intervene.

Endowed with the ability to control storms, Tancred is a student who refuses to stand by while younger children are targeted. He provides magical muscle during the climactic struggle within the academy's ruins.

Zelda is one of the maliciously endowed children at Bloor's Academy. She aligns herself with the school's corrupt hierarchy, using her powers to trap and intimidate students who threaten the Bloors' control.

A quiet music teacher at Bloor's Academy whom Charlie discovers playing beautifully in an isolated room. He remains detached from the school's sinister politics.

A teacher at the academy who exemplifies the staff's general indifference to the danger the students face. He ignores emergencies to focus entirely on his own routine.

An academy staff member who turns a blind eye to the malicious acts committed by the Bloors and their favored students, prioritizing menial tasks over child safety.

A legendary thirteenth-century African sorcerer whose magical bloodline split into opposing factions of good and evil. His ancient decisions and vast powers set the stage for the conflict his modern descendants currently fight.