One of Us Is Lying

Addy Prentiss enters One of Us Is Lying as the classic "pretty girlfriend" — popular, agreeable, and entirely shaped by her relationship with Jake Riordan. Her presence in detention on the day Simon Kelleher dies sparks a dramatic unraveling of that identity. At first, Addy is so accustomed to deferring to Jake that she struggles to have her own opinions, wear clothes he hasn’t approved, or even envision a life without him. When it comes to light that Simon's About That gossip app is set to reveal her affair with TJ Forrester, Jake's controlling nature erupts into emotional and eventually physical intimidation, forcing Addy to confront how completely she has erased herself to gain his approval.

Her journey is the most transformative in the novel: scene by scene, Addy breaks free from her passivity. She cuts her hair without Jake's permission — a small act that carries significant meaning — begins spending time with Janae Norman (Simon's closest friend), and starts to trust her own judgment. When she uncovers Jake's involvement in orchestrating Simon's murder, she records his confession, a moment of bold courage that directly leads to his arrest and clears the Bayview Four.

Addy embodies deep empathy (she genuinely mourns for Simon, despite hardly knowing him), a sense of guilt, and a resilience she didn't realize she had. By the end of the novel, Addy transitions from being an ornament to becoming an active agent — a young woman reclaiming the narrative of her own life.

Bronwyn Rojas is the academic star of One of Us Is Lying by Karen M. McManus — a senior set for Yale whose carefully curated image of the perfect student starts to unravel after she's implicated in Simon Kelleher's death. Present in detention the day Simon dies, Bronwyn is quickly labeled a suspect, a designation that terrifies her since her self-worth hinges on being perceived as good and obedient. The key irony in her story is that she has broken the rules before: she cheated on a chemistry test, a secret Simon intended to reveal through his gossip app. This hidden guilt makes her both a believable suspect and a character that readers can empathize with.

As the investigation heats up, Bronwyn forms an unexpected bond — and eventually a real romance — with rebel Nate Macaulay, challenging her parents' expectations and her own cautious nature. Their relationship pushes her to differentiate between how things appear and true moral bravery. She ultimately shows that bravery by revealing information that helps catch the real killer, putting her reputation on the line to do what's right.

Bronwyn is highly intelligent, fiercely loyal to her younger sister Maeve, and often tries to control situations through meticulous planning and logic. Her journey reflects a classic coming-of-age story that dismantles perfectionism: she discovers that vulnerability, honesty, and standing by imperfect people are more important than maintaining a spotless record. By the end of the novel, she is still on track for Yale, but she is much less defined by that goal.

Cooper Clay is one of the four main suspects in One of Us Is Lying by Karen M. McManus, a young adult thriller set at Bayview High. As a star baseball pitcher with a Division I scholarship on the line, Cooper starts off as the quintessential all-American boy — popular, charming, and seemingly lacking any motive to hurt Simon Kelleher. However, his journey evolves into the most emotionally impactful coming-of-age story in the novel: Cooper is gay and has been concealing his relationship with Kris Chen, fearing that being outed could jeopardize his athletic future and let down his father.

Simon's gossip app, About That, threatens to expose Cooper, giving him a potential motive for murder. As the investigation heats up, Cooper's secret comes to light — first to his fellow Bayview Four, and then to the entire school and media. Instead of breaking him, this exposure turns out to be freeing. In a crucial moment, Cooper publicly acknowledges his relationship with Kris, choosing to embrace his true self over the scholarship he has sacrificed so much to protect.

Cooper is characterized by loyalty, quiet bravery, and a deep-rooted fear of being vulnerable. He looks out for those he cares about and is slow to anger, but the strain of living a double life makes him cautious and evasive early in the story. His readiness to support Bronwyn, Addy, and Nate — even at personal risk — highlights his intrinsic decency. By the end of the novel, Cooper’s journey shifts from hiding to openness, making him one of the strongest examples of identity and self-acceptance in the face of pressure.

Evan Neiman is a supporting character in One of Us Is Lying, primarily serving as Bronwyn Rojas's boyfriend and, later, as a casualty amid the novel's deepening secrets. At the beginning of the story, Evan is the steady, well-liked boyfriend that Bronwyn is hesitant to lose—a figure representing the stability she has to protect. He is kind and trusting, qualities that make him easy to overlook in the face of the thriller's grander conspiracies. However, his significance increases as Bronwyn gets entangled in Simon's death and her growing closeness with Nate Macaulay starts to put a strain on their relationship.

Evan is marked by genuine affection for Bronwyn and a refreshing lack of deceit; he doesn't possess the cynicism or cleverness that many of the novel's main characters exhibit. This sincerity makes the eventual breakdown of their relationship feel more poignant than dramatic—he isn’t betrayed by malice but simply outgrown. As Bronwyn develops feelings for Nate and the murder investigation compels her to face her true self, Evan symbolizes the comfortable, uncomplicated life she is moving away from.

His storyline is simple but thematically significant: he represents the "before" version of Bronwyn's life—safe, predictable, and ultimately inadequate. By the time Bronwyn and Nate's connection solidifies, Evan has receded from the main narrative, his departure marking Bronwyn's full commitment to a more authentic, albeit riskier, version of herself. He is never cast as a villain; he simply belongs to a chapter that has come to a close.

Jake Riordan is the main antagonist of the novel and the hidden mastermind behind Simon Kelleher's murder. On the surface, he appears to be Bayview High’s confident jock—Addy Prentiss's long-term boyfriend who gives off the image of a loyal and protective partner. However, beneath this façade, Jake is manipulative, possessive, and ruthlessly self-serving. His character evolves from a background figure to a revealed villain; early chapters portray him as a supportive boyfriend involved in the murder investigation, but as the story unfolds, clues start to reveal his true nature. Jake secretly colluded with Simon to spread damaging gossip about the Bayview Four, and when Simon threatened to expose Jake's infidelity with Addy, Jake orchestrated Simon's death by tampering with the EpiPens and setting up a detention scenario. His control over Addy is a defining aspect of his character—he keeps tabs on her friendships, isolates her from Janae Norman, and emotionally manipulates her throughout the investigation to ensure she stays silent and compliant. When Addy begins to assert her independence and grows closer to the other suspects, Jake's hold on her becomes increasingly oppressive, leading to a violent confrontation that puts her life in danger. His eventual exposure and arrest serve as the novel's climax and signify Addy's transformation from a passive victim to an empowered survivor. Jake symbolizes toxic masculinity and coercive control, sharply contrasting with the genuine solidarity the four suspects develop among themselves.

Janae Norman is Simon Kelleher's closest — and, as we find out, only true — friend at Bayview High. She’s a quiet, fiercely loyal outsider, and her grief and guilt shape her journey throughout the novel. When Simon dies in detention, Janae's devastation stands in stark contrast to the rest of the school's performative mourning; she knew the real Simon, ran his gossip app About That, and kept his secrets even after he was gone. Her story evolves from a deep protectiveness of Simon's memory to a painful confrontation with who he really was.

Janae is defined by her fierce loyalty, social reticence, and a tendency for self-deception rooted in love. At first, she deflects suspicion and misleads the investigation by deleting app data to protect Simon's legacy. As Bronwyn and the other "Bayview Four" dig deeper, Janae is gradually compelled to face the reality that Simon may have orchestrated his own death as part of a revenge scheme — and that she unknowingly played a role in it. The moment she decides to confide in Bronwyn marks the emotional turning point of the novel: Janae's grief transforms from simple mourning into something more complex and tinged with betrayal.

She is not a villain but rather a foil, illustrating what blind loyalty to Simon feels like from the inside. By the end, her readiness to tell the truth, even if it tarnishes Simon's reputation, signifies her growth from a grieving accomplice to a truthful witness, providing the Bayview Four with the final piece needed to expose Jake Riordan.

Kris Chen is Bronwyn Rojas's boyfriend and a steady source of support throughout One of Us Is Lying by Karen M. McManus. Although he isn't one of the five students in detention when Simon Kelleher dies, Kris plays an important role as a loyal figure for Bronwyn during a chaotic time in her life. He is shown to be reliable, kind, and genuinely concerned about Bronwyn's well-being, providing emotional support as she deals with suspicion, media attention, and the unfolding details of Simon's murder.

Kris's story arc is largely shaped by his relationship with Bronwyn. As the investigation heats up and Bronwyn grows closer to Nate Macaulay—first as a fellow suspect and later romantically—Kris's role shifts from a supportive boyfriend to someone affected by Bronwyn's evolving feelings. Ultimately, Bronwyn ends their relationship as she recognizes her deepening bond with Nate. While Kris is hurt by this, he is presented with enough dignity that he never comes across as a villain. His response highlights Bronwyn's inner struggle between the safe, expected path (Kris, Yale, perfection) and the more authentic, complicated life she is beginning to embrace.

Key traits of Kris include emotional maturity, dependability, and a lack of pettiness. He embodies the "before" version of Bronwyn's life—structured and focused on achievement—making his departure from her romantic life a significant indicator of her character growth. Though a minor character, Kris's presence enhances the stakes of Bronwyn's personal transformation.

Luis Rojas is Bronwyn's charming and insightful older brother, serving as a minor yet significant supporting character in One of Us Is Lying by Karen M. McManus. While he isn't involved in the central murder investigation, Luis plays an emotional anchor for the Rojas family, providing warmth and a grounded perspective amid the turmoil of Bronwyn's connection to Simon Kelleher's death.

Luis is known for his easy confidence and genuine affection for his sisters. He teases Bronwyn in that familiar way older siblings do, but his playful jabs are never mean-spirited—they humanize her and remind readers that beneath her overachiever facade, she's still a teenager navigating family dynamics. He also looks out for Maeve, their younger sister, and his presence emphasizes the close-knit nature of their family.

His character arc remains largely unchanged; he doesn't undergo a significant transformation. Instead, he acts as a stabilizing force: when Bronwyn is overwhelmed with anxiety about the investigation, Luis's relaxed demeanor reminds everyone that life goes on outside of the courtroom drama. His scenes help ground the novel's pacing and provide a break from the thriller's escalating tension.

Luis embodies loyalty, humor, and a straightforward moral compass—traits that stand in contrast to the moral ambiguity surrounding the Bayview Four. He never wavers in his belief in Bronwyn's innocence, and his quiet faith in her reflects the reader's growing conviction that she is being unjustly suspected. In this way, even a secondary character like Luis carries thematic significance regarding family trust and unwavering support.

Maeve Rojas is Bronwyn's younger sister and a recurring supporting character in One of Us Is Lying by Karen M. McManus. While she isn't one of the four main suspects, Maeve serves as an emotional anchor and an amateur investigator, helping to unravel the mystery as it unfolds. A cancer survivor—her leukemia is mentioned early on as a significant part of her life that has made her both sharp and fiercely loyal—Maeve tackles the turmoil surrounding Simon's death with an analytical approach that rivals Bronwyn's academic prowess.

Maeve is known for her dry humor, emotional intelligence, and her refusal to accept simple explanations. She is quick to express doubt about the official story of Simon's death and encourages Bronwyn and the other Bayview Four to dig deeper instead of just going along with what the authorities say. In important moments, she offers essential support to Bronwyn during the investigation, helping her sister navigate feelings of guilt, fear, and her growing attraction to Nate.

Her journey shifts from a worried younger sister to a vital ally. She forges a significant bond with Janae Norman—Simon’s closest friend—which adds a tender subplot to the novel and gives Maeve her own emotional stakes beyond her sister’s troubles. By the end of the book, Maeve has transformed from a background character into a key player whose instincts and bravery have genuinely influenced the outcome, showing that courage and insight can come from unexpected places.

Mr. Avery is the teacher on duty in One of Us Is Lying by Karen M. McMurtry (published under Karen M. McManus) who supervises the pivotal detention session during which Simon Kelleher dies. His role is largely functional; he is the adult authority figure present at the critical moment, yet his presence highlights how ineffective adult supervision can be in truly protecting the students. At the beginning of the novel, Mr. Avery assigns detention to Bronwyn, Addy, Nate, and Cooper after their phones are discovered in their bags—phones none of them admit to bringing on purpose, a detail that later becomes crucial in the murder investigation. When Simon suddenly collapses and goes into anaphylactic shock, Mr. Avery tries to respond but cannot save him, and his version of events is included in the official record that investigators examine. He comes off as a by-the-book authority figure who upholds school rules without any particular malice or understanding, making him a representation of institutional indifference. His character doesn’t develop—he doesn’t grow or change—but his actions at the start of the story set the entire plot into motion. The detention he hands out turns four unrelated students into suspects, forcing them into an unexpected alliance. Mr. Avery thus acts as a narrative catalyst: his standard enforcement of school policy unintentionally places four teenagers at the heart of a murder investigation that will change their lives forever.

Nate Macaulay is one of the four main suspects in Karen M. McManus's One of Us Is Lying, known as the "Bayview Four." He’s a motorcycle-riding loner who dabbles in drug dealing while trying to stay under the watchful eye of his probation officer. By the time the story begins, Nate is already seen as a criminal by the social circles at Bayview High. He’s present in Mr. Avery's detention when Simon Kelleher dies, making him an easy target for suspicion—his troubled past leads both investigators and classmates to jump to conclusions.

Nate's journey is one of the most redemptive in the novel. At first, he’s guarded and often sabotages his own chances of connection, keeping others at a distance as a way to cope with his chaotic home life. With an absent mother and an alcoholic father, he feels isolated. His budding romance with Bronwyn Rojas challenges him to tear down those defenses; he opens up to her about his father's struggles and his fears of repeating those mistakes, revealing a vulnerable side beneath his tough exterior. When he is arrested and charged with Simon's murder—set up by evidence tied to his drug dealings—his trust in the system crumbles. However, Bronwyn's unwavering support becomes the emotional anchor he needs.

In the end, Nate decides to cooperate with the group’s investigation, and the truth ultimately clears his name. By the conclusion of the novel, he has learned to accept help, confronted his feelings for Bronwyn, and is taking tentative steps toward a future that goes beyond the label Bayview placed on him. His defining traits include fierce independence, a sharp sense of humor, loyalty to those who earn it, and a newfound capacity for hope.

Officer Nadia Santiago is the lead detective investigating Simon Kelleher's death at Bayview High, acting as the main institutional antagonist and pressure point throughout One of Us Is Lying. Her role is more functional than personal: she embodies the criminal justice system pressing down on the four suspects—Bronwyn, Addy, Nate, and Cooper—who were in detention when Simon died.

Santiago is methodical, skeptical, and persistent. She conducts repeated interrogations of each suspect, probing inconsistencies in their stories and using the circumstantial evidence that builds against them. She pays particular attention to Nate, whose previous drug conviction makes him the most legally vulnerable, and she pursues him with the most intensity, ultimately arresting him when evidence is manipulated to point toward him. This arrest serves as the novel's dramatic low point and motivates the remaining suspects to take matters into their own hands.

Santiago isn't depicted as corrupt or malicious—she follows the evidence as it unfolds—but her narrow focus on the four detainees makes her slow to consider other suspects, most importantly Jake Riordan. Her story arc wraps up when the real perpetrator is revealed; she ultimately facilitates Jake's arrest, showing that the system, although blunt, can correct itself. She acts as a narrative foil to the teenagers' grassroots investigation, emphasizing how institutional processes can endanger the innocent while still managing to deliver justice in the end.

Simon Kelleher is the driving force behind One of Us Is Lying by Karen M. McManus—a lonely outcast obsessed with true crime, whose death in detention triggers the entire story. He created Bayview High's infamous gossip app, About That, and uses the secrets he uncovers as weapons, threatening to expose his classmates to control and humiliate them. On the day he dies, he's in detention with Bronwyn, Addy, Nate, and Cooper—each of whom he planned to expose—making them all immediate suspects.

Although Simon is seen only through flashbacks and reconstructed narratives, his presence is felt throughout the novel. He is depicted as bitter, calculating, and profoundly lonely, hiding deep pain behind his cruel demeanor. The shocking twist reveals that Simon planned his own death as an elaborate act of revenge: he faked an anaphylactic reaction to frame the four detainees for his murder, aiming to ruin their lives as he believed his own had been ruined—especially after being betrayed by his supposed best friend, Jake Riordan.

Simon's journey is one of tragic radicalization: a bullied and isolated teen who turned his pain into a detailed, self-destructive plot. His posthumous posts on "About That" keep haunting Bayview even after he's gone, showing his influence lingers. In the end, Simon embodies both victim and villain—his loneliness sheds light on the harsh realities of high school culture while his actions force every character around him to confront their morals.

In Karen M. McManus's One of Us Is Lying, deception is more than just a single act; it’s a complex web. Every character has something they're hiding, and the story's main tension stems from the clash between how characters present themselves and the truths they keep buried.

The very premise is built on a lie: Simon's death during detention appears to be an allergic reaction, but the EpiPens have been tampered with, indicating that someone set up an accident. This initial deceit sends shockwaves through the narrative, prompting readers to scrutinize each character’s version of events.

Each of the four suspects — Bronwyn, Addy, Nate, and Cooper — harbors a personal secret that Simon's gossip app, About That, was ready to reveal. Bronwyn, the academic high achiever, cheated on a test. Cooper, the star athlete, is hiding his sexuality. Addy has been involved in a secret relationship that her controlling boyfriend doesn't know about. Nate is selling drugs. Their secrets are crucial to the plot; they show that deception runs deep in Bayview High's social fabric, long before Simon's death.

McManus also presents Simon as a case study in manipulative deceit — he gathered others' secrets while keeping his most destructive one hidden: he engineered the entire scenario to fake his death and frame the others, a scheme that ultimately spiraled out of control. His About That app, which was supposed to reveal truths, turned out to be a weapon of manipulation.

The detention room, a place intended for accountability, becomes ironically significant, as it’s where the most intricate deception takes place. Even the growing bond among the "Bayview Four" is complicated by the fact that each person keeps secrets from the others throughout the investigation, implying that trust in this environment is always tentative.

In One of Us Is Lying by Karen M. McManus, friendship isn't something that just happens; it's painfully built across the social barriers that the characters have upheld throughout their high school years. The four suspects — Bronwyn, Addy, Nate, and Cooper — start the story as almost strangers, connected only by a detention room and a murder accusation. Initially, their interactions are cautious and transactional, each hiding their own secrets, but the shared burden of suspicion slowly breaks down the barriers between them.

A significant motif is the group's informal gatherings, which evolve from tactical meetings into something warmer and more genuine. When Addy, recently freed from her controlling boyfriend Jake, finds herself embraced by the group without any conditions, it signifies the novel's first real moment of chosen connection. McManus highlights Addy's transformation — from a girl who saw herself solely through her relationship to one who expresses her own thoughts — as the clearest demonstration of what true friendship can achieve.

Cooper's storyline adds further depth to this theme. His friends on the baseball team represent loyalty based on a facade, while the Bayview Four accept him once his secret comes to light. This contrast emphasizes McManus's main point: genuine friendship requires vulnerability and endures through honesty, whereas friendships based on pretense fall apart the moment the act ends.

By the end of the novel, the group's bond faces challenges not only from the murder investigation but also from each member's readiness to reveal their most authentic, unfiltered selves — and to remain together despite that.

In Karen M. McManus's One of Us Is Lying, guilt acts more like a slow-acting poison that reshapes each suspect's identity long before the truth comes to light, rather than just a confession waiting to happen. The story revolves around four students stuck in detention the day a fifth student, Simon, dies, which immediately spreads guilt among them, leaving both readers and characters struggling to pinpoint it.

Bronwyn feels guilty about her academic dishonesty; her secret cheating seems minor compared to a murder charge, yet it paralyzes her because her self-image as the "good student" crumbles once it's revealed. Her guilt is ironically performative — she has spent years presenting herself as innocent.

Addy's guilt is tied to her relationships. She kept quiet while her boyfriend Jake controlled and belittled her, and when it becomes clear he was involved in Simon's death, her silence feels heavier than any external accusation. Her journey is about recognizing the guilt that genuinely belongs to her versus the guilt that others have conditioned her to accept.

Cooper grapples with guilt related to hiding his sexuality and steroid use. McManus illustrates how shame and guilt intertwine through him: he fears being outed not because he has wronged anyone, but because his community has taught him that living authentically is a crime in itself.

Nate's guilt is the easiest to see; his history with drugs makes him the prime suspect, and he internalizes that suspicion, almost resigning himself to punishment as something unavoidable. His story explores how systemic bias can invade a person’s conscience.

Simon, even after his death, emerges as the most unsettling figure of guilt in the novel — orchestrating harm from beyond the present timeline and implicating the reader who initially sympathized with the victim.

In One of Us Is Lying by Karen M. McMurtry, identity is portrayed not as a fixed truth but as a performance shaped continuously by social pressure, secrets, and how others perceive us. The novel's driving force — Simon's gossip app, About That — brings this anxiety to the forefront: each student's "true self" is seen as scandalous information waiting to be uncovered, indicating that Bayview High thrives on the currency of crafted images. The four suspects (Bronwyn, Addy, Nate, and Cooper) are introduced through simplified social labels — the Brain, the Beauty, the Bad Boy, the Jock — and the story's tension arises from breaking down these categories.

Addy's journey is the clearest example. Her identity has been completely defined by her boyfriend Jake, influencing everything from her wardrobe to her social circle. When the murder investigation forces her to become independent, she cuts her hair, symbolizing a deliberate rejection of the identity Jake built for her. Although this act seems minor, the novel presents it as more significant than any major plot twist.

Cooper's narrative explores identity through secrecy: his hidden truth isn't a crime but his sexuality. The novel cleverly draws a parallel between concealing a gay identity and hiding guilt — both regarded by Bayview's social norms as equally shameful. This parallel serves as the novel's sharpest critique.

Bronwyn, on the other hand, realizes that her "perfect student" persona has made her fragile rather than resilient. It takes real risk — lying to protect Nate — for her to find an identity she can truly recognize. Throughout, McMurtry emphasizes that the identities characters adopt under pressure reveal more about them than the labels assigned before the story starts.

In One of Us Is Lying by Karen M. McManus, the concept of justice feels elusive — it’s actively sought yet consistently compromised — pushing the four suspects to look for truth beyond official avenues.

The heart of the novel centers on the police investigation into Simon Kelleher's death while in custody, where Bronwyn, Addy, Cooper, and Nate are instantly viewed as guilty simply because of their presence and social standing. Detective Wheeler's questioning relies heavily on stereotypes: the brain, the beauty, the jock, the criminal. This kind of profiling represents a subtle form of injustice, and McManus portrays it as a systemic issue rather than a mere coincidence — the legal system prioritizes a neat story over an accurate one.

Nate experiences the harshest form of institutional injustice. His previous drug charges make him the automatic suspect, and when he is formally taken into custody, it becomes clear that the arrest is more about convenience than actual evidence. His journey raises the question of whether someone already labeled by the justice system can ever truly expect a fair hearing within it.

The app Simon operated — About That — further complicates the idea of moral justice. Simon used exposure as a weapon, and his death prompts the troubling question of whether his cruelty provoked retaliation. McManus skillfully avoids letting the characters or the reader slip into simple sympathy; Simon's status as both victim and perpetrator coexists.

Genuine resolution arises not from law enforcement but from the students themselves, as they unravel Jake’s manipulation and Simon's own part in orchestrating the detention. Justice ultimately emerges through confession and accountability among peers, suggesting that formal justice systems, constrained by hierarchy and bias, might not always uncover the truth that personal connections can reveal.

In One of Us Is Lying by Karen M. McManus, social class isn't just a backdrop; it subtly drives suspicion, motives, and self-worth. The four suspects — Bronwyn, Addy, Cooper, and Nate — are quickly categorized by their economic status, which influences how they are treated by Bayview High's administration and the wider community after Simon's death.

Nate's working-class background is the most evident source of pressure. Early on, his father's instability and their tight financial situation are presented as circumstantial "evidence" of his guilt. The story makes it clear that both adults and peers find it easier to believe that a kid who deals drugs and struggles financially could commit murder. His economic vulnerability acts like an assigned guilt, leading to his arrest — not because he’s the most guilty, but because he’s seen as the most expendable.

On the other hand, Addy's storyline adds complexity. Her relationship with Jake partly hinges on the status and financial security he provides. When that relationship falls apart, she loses not just a boyfriend but the entire social standing she had been upholding. Her journey toward independence is tied to recognizing how much of her identity was borrowed from his class position.

Bronwyn's aspirations for college are overshadowed by the pressure to maintain the image that scholarships and Ivy League acceptance demand — a pressure that made her susceptible to Simon's blackmail in the first place. The app Simon created serves as a leveling tool: it threatens to dismantle the carefully constructed personas each student uses to secure their place in Bayview's social hierarchy.