Andy’s journey is defined by the fame he inherits in the wake of April’s disappearance, foregrounding the novel’s thematic interest in The Performance of Identity in the Age of Social Media. He reluctantly steps into the role of a public intellectual, crafting a persona as the “sad, smart, nerdy guy” (33) to meet the world’s expectations. Guided by Maya’s advice to “tell them something that will make them feel better” (33), he becomes a voice of measured optimism in a world grappling with loss and uncertainty. However, this public role is deeply isolating. While he gains influence and wealth, he loses authentic connection, finding himself surrounded by transactional relationships and the immense pressure of upholding his brand. His friendship with his roommate Jason and his tentative romance with Bex represents his attempts to anchor himself to a reality outside of his fame, highlighting his deep-seated loneliness and his struggle to reconcile his public duties with his personal needs.

Andy’s character is further complicated by his fascination with the new Altus Space. He initially becomes the “Altus Guy,” a public champion for the platform, which gives him insider access and influence, in a strategic attempt to fight the system from within. However, Andy finds he genuinely loves the Altus Space, viewing its power and potential as revolutionary. This internal conflict illustrates The Use of Technology to Manipulate Belief and Behavior, showing how a system can co-opt resistance by appealing to individual desires. His eventual anger at the destruction of Altus reveals the depth of his addiction and the complexity of his motivations.

Ultimately, Andy’s arc is about confronting the true nature of power and influence. He learns that wielding power, whether through social media or wealth, comes at a significant personal cost. His journey through the world of Altus and his collaboration with the anonymous entity known as The Thread teach him about the hidden systems that shape society. His decision to help fund the buyout of Altus, giving away the immense fortune he has acquired, marks the culmination of his growth. He becomes an active agent who understands that true, positive impact sometimes requires the relinquishment of personal power for the collective good.

Maya’s arc is propelled by a refusal to accept April’s death. While her friends attempt to move on, Maya’s grief manifests as a determined, near-obsessive investigation into April’s disappearance. This unwavering loyalty serves as the primary engine for the novel’s early plot, establishing her as a character of immense resolve. Her insistence that “April isn't dead and I'm not going to keep pretending that she is” isolates her but also positions her as the story’s principal detective (10), piecing together disparate clues from the Som, a social media platform she helped build. Her journey is deeply personal, driven by love and a refusal to accept the world’s version of reality, positioning her as a grounded point-of-view character in a story filled with extraordinary events.

As a foil to the public-facing lives of April and Andy, Maya’s defining trait is her desire for privacy. She actively resists fame, stating, “I wanted to be a private person, and now I’m not” (3). This reluctance adds a layer of irony to her eventual emergence as a key player in the fight against Altus. She does not seek power or influence; her actions are born of necessity and her commitment to her friends. This core value also informs her identity, which is complicated by her wealthy upbringing, a source of private shame that she feels separates her from others. Her character arc involves navigating this tension between her desire to remain anonymous and the call to public action, forcing her to step into the spotlight she has always avoided.

Beyond her role as April’s ex-girlfriend, Maya develops into a capable and independent protagonist. Her investigation into the strange events in New Jersey showcases her intelligence and resourcefulness. She operates alone, infiltrating facilities and tracking subjects, demonstrating a resilience that exists outside of her relationship with April. While her love for April is her initial motivation, her actions throughout the novel establish her as a formidable force in her own right. She is the one who physically confronts threats, who holds April accountable for her past actions, and who ultimately helps deliver the final blow to Altus.

Miranda Beckwith is a PhD student whose intellectual ambition drives her to investigate the ethical issues with Altus’s new technology. When Carl’s advanced technology makes her own research feel obsolete, she feels a mix of despair and intense curiosity that motivates her to infiltrate Altus. Miranda embodies the ethical struggle of a scientist tempted by the allure of revolutionary discovery, even when it is controlled by those she disdains. Her journey into Altus reveals a world where scientific progress is divorced from ethical considerations.

Despite her formidable intellect and her past success in creating the Som, Miranda is plagued by impostor syndrome. She consistently feels like an outsider in her friend group, believing she is not as cool or as central to the story as April, Maya, or Andy. Her arc sees her moving from a place of personal insecurity to one of confident resolve. She undertakes the dangerous mission of corporate espionage alone, operating under immense pressure despite her self-doubt. Undercover at Altus, she writes, “I was trying to catalog everything I saw in case it became important to my espionage, and that made me feel like I was constantly at risk of being caught” (178). Miranda’s investigation teaches her to trust her own instincts and reinforces her value to her friends’ collective effort to dismantle Altus.

Her imprisonment within the Altus Space highlights the novel’s thematic focus on The Dangers of Centralized Power. Trapped inside her own mind in a simulated reality, she must rely solely on her scientific mind to diagnose her situation and engineer an escape. This experience is a literal manifestation of the use of technology to manipulate belief and behavior, and her methodical approach to solving it highlights her strength and intelligence. Miranda’s ultimate act of sabotage against Altus is the culmination of her character arc. By identifying and exploiting a systemic vulnerability in the Altus Space, she uses her scientific knowledge to engineer Altus’s controlled destruction. Her plan to use an experience of “body dislocation” to permanently lock all users out of the system is a daring and ethically complex solution.

Carl is a non-human intelligence whose consciousness is distributed across the planet’s biosphere. As a character, they function as both a mentor and a source of cosmic exposition, explaining the nature of their existence and the threat facing humanity. Carl describes their primary purpose as benevolent: “I was sent here in pieces to self-assemble and then mutualistically infect your planet because, without me, a fascinating and beautiful system would have a low probability of self-correcting to sustainability” (165). They perceive individuals not as sacred beings but as variables in a massive probabilistic equation, allowing them to take risks, like permitting Maya to be shot, that are morally reprehensible from a human perspective. This utilitarian calculus highlights the inherent dangers of a centralized, all-powerful intelligence, even one with good intentions.

Carl’s physical manifestations, including the giant robot statues, a small monkey, and a virtual assistant inside a speaker, challenge conventional notions of selfhood. They explain, “I don’t have a body, so I think of myself as being wherever my senses reach” (158). Carl is not a singular being in a singular place but a pervasive presence, a thinking infection. As a foil to their brother, a rival intelligence, Carl is defined by a set of ethical rules they cannot break. These rules, designed to prevent them from becoming a god, force them to act through human agents like April and her friends, positioning them as a guide and ally rather than an omnipotent ruler. Their eventual sacrifice is the ultimate act of this partnership, leaving humanity’s fate in human hands.