Cross is one of the main characters of the novel and a primary love interest, a deeply conflicted and dynamic figure torn between his familial duty and his secret identity. As the captain of Silver Block and son of the tyrannical General Merrick Redden, he publicly represents the oppressive regime. However, in secret, he is a Mod known as “Wolf,” who has been telepathically linked with Wren since childhood. The duality between being Cross Redden and Wolf forces him into a state of perpetual internal conflict, as he attempts to mitigate the damage of his family’s rule while hiding his true nature. Cross’s defining traits are his unwavering control, his deep loyalty to a select few, and a growing cynicism about the perpetual state of conflict on the Continent. He is a master of deception, able to hide his Mod abilities and his clandestine actions from his own family, though this secrecy ultimately damages his relationship with Wren.

Cross’s character arc is a journey toward complete disillusionment with the system he was born to uphold. He witnesses the brutality of his father and brothers firsthand, and while he tries to protect Mods where he can, he recognizes the futility of his efforts within a corrupt power structure. This struggle is encapsulated in his belief that “There are no winners in war, Dove. Everybody fucking loses” (110). His love for Wren shows a potential escape from this life, yet his loyalty to his mother, whose mind has been corrupted, tethers him to Sanctum Point. After Cross’s brothers shackle and torture him, and he is stripped of his command, his cynicism hardens into resignation. His ultimate offer to run away with Wren shows he no longer believes the world is salvageable and chooses personal survival with the person he loves over a futile ideological battle. When Wren refuses, it signifies the breaking point of his dual existence, severing his last emotional anchor and leaving him adrift in a world he no longer wishes to save.

Gray is an important, complex, round character who evolves from a seemingly one-dimensional, charming pilot into a figure of significant emotional depth. Initially introduced under the alias Kaine Sutler, Gray’s playful and cocky demeanor is a carefully constructed mask. Underneath the charm, Gray is a highly competent and dedicated mission lead for the Uprising, but his carefree attitude is a defense mechanism born from immense trauma. As a survivor of the Valterra Ridge bombing, he lost his entire immediate family and subsequently endured years of physical abuse from his uncle. This history informs his emotionally guarded nature and his reluctance to form deep attachments.

Gray’s unique Modified ability as a “grounder” is central to his role in the narrative. He can sense and soothe the emotions of others, a power that ironically contrasts with his own inability to process his grief. He instinctively calms those around him, making him a stabilizing presence even as he keeps his own pain locked away. His relationship with Wren becomes the catalyst for his emotional growth. In showing her his home at Valterra Ridge, he finally allows himself to be vulnerable, sharing the part of himself that “[he’s] never let anyone else see” (491). This act of trust deepens their bond and allows him to begin confronting his past. Gray’s journey is one of learning to let down his defenses and accept the possibility of genuine connection, moving from a man who uses charm to deflect intimacy to one who is willing to share his vulnerabilities.

Kallister is the primary antagonist of the novel, a dynamic and round character who shifts from a paternal mentor figure to a ruthless tyrant. As the twin brother of Jim, Kallister initially appears to be a reasonable and compassionate leader within the Uprising’s Authority. However, this persona is a deception. Kallister’s defining traits are his cunning, his patience, and his unwavering belief that his ends justify any means. He is a powerful precog, an ability he uses to manipulate events to his advantage, as shown when he allows Mako’s death to occur because he foresaw it. His motivations are rooted in a rigid ideology that views any form of compromise as weakness.

Kallister’s transformation into the Uprising’s sole leader is the result of his long-term strategic planning. He secretly works with Hawkins, another powerful Mod, to develop corruption as a weapon, experimenting on innocent Prime civilians, including children. He sees Adrienne’s push for peace as a betrayal of the cause and uses the disastrous Bramble Base mission as a pretext to invoke Order Five, disband the Authority, and seize total control. He embodies the theme of The Impossibility of Moral Purity in War, arguing that extreme measures are the “fastest way to end this pointless war” (550). His willingness to betray his own brother’s memory, sacrifice allies, and experiment on innocents reveals him to be as tyrannical as the regime he claims to oppose, blurring the line between revolutionary and oppressor.

Xavier is a major supporting character whose arc is defined by a significant shift in loyalty. As a high-ranking Prime lieutenant in Silver Block and Cross Redden’s best friend, Xavier begins as a loyal soldier of the Command. His defining traits are a sarcastic and abrasive exterior that masks a deep-seated loyalty and an emerging moral compass. While Xavier initially appears to share the Command’s anti-Mod sentiment, his experiences on missions, particularly in the hospital ward with fragmented Mods, make him question his own beliefs. His decision to desert his post and help Wren escape is the story’s primary example of Personal Survival Versus Ideological Loyalty. Xavier risks execution not for the Uprising’s cause, but out of personal devotion to Cross and his growing friendship with Wren.

Once at the Dagger, Xavier serves as an outsider and a foil to the Uprising’s more dogmatic members. His imprisonment and the distrust he faces, highlight the chasm between Primes and Mods. Unwilling to betray his former allies but unable to return to them, he operates under his own code, declaring, “I’m a proud member of Team Stay Alive” (313). His eventual departure to the Faithful camp, the Hollow, represents his ultimate rejection of both the Command’s tyranny and the Uprising’s rigid politics. He finds a home among people who, like him, prioritize freedom and survival over ideological warfare, completing his transformation from a soldier in a regime to a man loyal only to himself and his friends.

Adrienne is a key leader of the Uprising and a static, round character who embodies the moral complexities of wielding immense power. As the Continent’s most widely known corrupter, she possesses the ability to rewire and destroy minds, a power she views as both a necessary weapon and a heavy burden. Her actions, such as corrupting General Redden’s mind to destabilize the Command, are driven by a pragmatic idealism; she believes that strategic, ruthless acts are justified in the pursuit of lasting peace. However, Adrienne is haunted by the accidental corruption of her mentor, Khem, an event that shaped her cautious and targeted use of her abilities. This internal conflict makes her a foil to Kallister, who seeks to weaponize corruption on a mass scale. Adrienne’s death by suicide is a tragic culmination of her exhaustion with the endless fighting, as well as her means to atone for the corruption of Kem..

Evlynne is a significant minor character who exemplifies the theme of Personal Survival Versus Ideological Loyalty. Initially presented as a hostile and zealous Severnist, she harbors a deep-seated hatred for Primes and a deep distrust of Wren’s incitement ability. However, when her young son Fisher develops a Bloodmark, Evlynne’s parental instincts take over ideological duty. Fearing the Authority will exploit her son, she makes a deal with Travis Redden, Fisher’s secret father, betraying the Uprising by leaking the location of Bramble Base in exchange for his protection. This act transforms her from a rigid ideologue into a mother willing to sacrifice her cause, her allies, and her honor for the safety of her child, making her a complex and tragic figure in the conflict.

Tana is Wren’s best friend from her childhood in Ward Z, her arc and showing the ripple effect of trauma. Tana is brutally assaulted by a Silver Elite soldier and imprisoned in the Ice Canyon salt mine, which erodes her trust in other human beings. Tana’s experiences leave her emotionally numb, resentful of Wren, and convinced she is “broken beyond repair” (335). Her journey after being rescued is one of slow healing and rebuilding trust. Her burgeoning relationship with Luisa and her eventual reconciliation with Wren signify her path toward recovery.

Poppy is the quiet, 16-year-old daughter of the Uprising’s healer, Fiona. She initially appears timid and is defined by her mother’s overprotective nature, which she finds suffocating. However, Poppy secretly harbors an incredibly powerful and dangerous ability: infliction, the power to manipulate nerve endings and cause extreme pain or death. She is terrified of this power, having accidentally killed her dog and a bird. Her character undergoes a dramatic shift when she kills the soldier Theo to save Wren’s life, forcing her to confront the lethal potential she possesses. Poppy’s journey is a coming-of-age arc, moving from a sheltered girl to a young woman grappling with a dangerous gift and the moral weight that comes with it.

As the new leaders of the Command, Travis and Roe Redden function as a multi-faceted antagonistic force. Both are static, flat characters who embody the tyranny of the regime. Travis, the new General, is the cold, calculating strategist. He is ambitious enough to collude with the Uprising to take down his own father, yet he quickly pivots to a hardline anti-Mod stance to consolidate his power, ordering public executions to instill fear. His younger brother, Roe, is the regime’s brute force. Insecure and eager to prove his worth, he unleashes his sadistic tendencies through his “hunting party,” torturing Cross and murdering Mods in the labor camps. Together, they represent the political and violent arms of an oppressive system.

The supporting operatives at the Dagger, including Mako, Saint, Henley, Karra, Teriq, and Fiona, serve to build the world of the Uprising and represent the diverse attitudes within the resistance. Mako acts as the group’s heart and comic relief, his tragic death showing the personal cost of the conflict. Saint is the quiet and observant mission lead, secretly a powerful persuader who manipulates situations from the shadows. Henley is the charming, easygoing pilot who rejects Severnist ideology. Karra is Gray’s fiery, on-and-off girlfriend, whose jealousy and pragmatism often clash. Teriq is a capable leader driven by the grief of losing his sister, Betima, making him distrustful of Primes. Fiona is the overprotective mother and healer, whose fear for her daughter Poppy leads her to be suspicious of others with manipulative powers.