Havelock Renard serves as the novel’s deuteragonist and primary love interest, a dynamic and round character who subverts the archetype of the fearsome dark magician. Publicly known as the notorious “Witch King,” who was responsible for a near-apocalypse three years before the start of the novel, Havelock is revealed to be a reclusive, socially awkward, and intellectually driven scholar of magic. His formidable reputation masks a deep-seated vulnerability stemming from his sister’s betrayal and a deep loneliness. When Agnes first encounters him, he appears as a disheveled man in pajamas who is allergic to cats and is more concerned with his magical experiments than with worldly power. This introduction immediately establishes the disconnect between his public persona and his private self, a central element of his character that ties into the theme of Reputation as a Mask for Vulnerability. He is ultimately motivated by an insatiable academic curiosity to understand the limits of magic, which he treats as a complex puzzle to be solved.

Initially, Havelock is abrasive and sarcastic, using his wit as a shield against emotional intimacy and the chaos of the outside world. He resents Agnes’s presence, viewing her and her cats as a “silly charity” (60) and an infestation that disrupts his solitude. His character arc is driven by Agnes’s persistent, grounding influence, which forces him out of his self-imposed isolation. Her organizational rampage through his chaotic workshop, while initially irritating to him, brings a necessary order that he is incapable of creating for himself. Through their collaboration, he begins to open up, revealing the truth about his past, the nature of his relationship with his twin sister Valérie, and the immense guilt he carries over the apocalypse he inadvertently enabled. His development is marked by his increasing willingness to accept help, express concern for others, and use his immense power for selfless rather than purely academic purposes, such as ridding the shelter of fleas or creating the illusory birds to entertain the cats.

Havelock’s relationship with magic is complex and fraught. He is drawn to the Rivenwood, the source of his power, yet he is acutely aware of its corrupting influence, which physically and spiritually threatens to consume him. His other form, a creature of shadow and flame, symbolizes this dangerous, non-human aspect of his nature that he struggles to control. Despite his immense power, he is often helpless in mundane situations, as shown by his disastrous attempt to care for the shelter cats. This highlights his dependency on others, particularly Yannick and Agnes, for practical and emotional support. By the novel’s end, Havelock has learned to let someone new into his private world, embracing a connection that offers a counterbalance to the isolating and dangerous nature of his magical pursuits.

Valérie Renard is the primary antagonist of the novel. As Havelock’s twin sister, she is a powerful and charismatic magician whose core motivation is an insatiable hunger for power. Her character is a direct embodiment of the theme of Ambition as Moral Corruption. Once Havelock’s childhood protector, her love for her brother has curdled into a bitter rivalry fueled by jealousy of his superior magical abilities. Valérie believes that magicians should not have to hide their powers and should be free to use them as they wish, a philosophy she uses to justify her reckless and destructive actions. She surrounds herself with a cult-like following of apprentices who are drawn to her charisma and her vision of magical supremacy, but whom she ultimately views as disposable tools in her quest for power.

Valérie is a performative and dramatic magician, taking aesthetic pleasure in the spectacle of her enchantments, such as the phantasmal carousel horses she summons from the clouds. Unlike Havelock, who approaches magic as a reclusive scholar, Valérie wields it as a weapon for dominance and public display. Her primary goal is to obtain Vortigern’s time-traveling book, which she believes will grant her access to a library of lost spells and make her the most powerful person in existence. This single-minded pursuit makes her ruthless and indifferent to collateral damage. She manipulates Havelock into helping her orchestrate the near-apocalypse out of a reckless desire to test a powerful spell and intimidate her rivals, and she shows no remorse for the chaos and destruction she causes. Her actions demonstrate a complete lack of empathy, as she is willing to destroy a public space, endanger innocent lives, and betray her own brother to achieve her goals. Her defeat comes through the neutralizing magic of Vortigern’s Lantern, which strips her and her followers of their power, providing a thematic resolution that emphasizes the removal of corrupting power, rather than defeat by violence.

Élise is Agnes’s younger sister and her most loyal confidante, serving as a classic foil to the protagonist. She is a static, round character whose defining traits are her fierce pragmatism, sharp wit, and an impressive talent for deception. Where Agnes is earnest and emotionally transparent, Élise is cynical, resourceful, and capable of spinning elaborate lies with ease to protect her sister. She acts as Agnes’s anchor to the practical world, constantly looking out for her well-being, from bringing her food to confronting landlords and, eventually, powerful magicians. Her motivation is simple and unwavering: She is devoted to Agnes’s safety and happiness.

While initially terrified of the magical conflict Agnes is drawn into, Élise never hesitates to stand by her sister’s side. She approaches the supernatural threat with the same ruthless practicality she applies to mundane problems, viewing Havelock as a dangerous liability and Valérie as an enemy to be outmaneuvered. She is the first to suggest that Havelock owes them for the danger he has caused and is unafraid to challenge him directly, her sharp tongue often puncturing his intimidating facade. Despite her cynicism, Élise shares Agnes’s deep-seated loyalty and love, demonstrating that her tough exterior is a form of protection for both herself and her sister. Her consistent presence provides both emotional support and a necessary dose of realism, grounding the narrative’s more fantastical elements.

Yannick Abrams is Havelock’s earnest and anxious apprentice, a static but essential supporting character. Described by Agnes as being “like an open book” (32), Yannick’s inability to conceal his thoughts makes him a poor liar but a trustworthy source of information. He serves as an important bridge between Agnes and the arcane world of magic, often providing important exposition about the Rivenwood, magical theory, and Havelock’s past. His primary motivation is his deep loyalty and gratitude toward Havelock, who gave him refuge and a purpose after his own family cast him out for being a magician. This devotion often manifests as a worried, almost parental concern for Havelock’s well-being and reclusive habits. Though a magician himself, Yannick lacks the overwhelming power and intimidating presence of Havelock or Valérie, making him a more approachable figure for Agnes. He shows a more benign and human-centric approach to magic, using his developing skills to help at the shelter and acting as a moral counterpoint to the Renard twins’ epic and destructive conflict.