Benny is one of the two protagonists and first-person narrators of This Story Might Save Your Life. His point-of-view chapters describe the ongoing investigation into Joy’s disappearance in the novel’s present. Like Joy, Benny is not a fully dependable narrator, as his perspective is increasingly shaped by stress and emotional bias, and his understanding of events is guesswork arrived at from incomplete information. After Joy’s disappearance, Benny loses some cognitive abilities because of stress: “time is an abstract concept I can no longer grasp” (135), indicating The Unreliability of Perception and Memory in times of crisis.

Benny is Joy’s closest ally, contrasting sharply with Xander’s overbearing and abusive role. Unlike Xander, Benny does not restrict Joy’s autonomy; instead, he engages with her as an equal, particularly through their podcast partnership. Their creative dynamic is built on collaboration and mutual respect, in which ideas are exchanged rather than imposed. Benny is flawed in ways that highlight his fundamental goodness: His romantic feelings for Joy undermine his marriage, spur jealousy and impulsive actions, and cause him to lash out angrily, such as during their argument before her disappearance.

Benny’s character arc revolves around Reclaiming One’s Voice by overcoming feelings guilt while taking responsibility for mistakes. In the first part of the novel, Benny perseverates on his failure to intervene on behalf of Joy’s safety. He repeatedly revisits past interactions with Joy to decode hidden meanings and reconstruct what he believes he failed to see. As the investigation progresses, Benny’s frustration leads to him jumping to conclusions about suspects and motives despite incomplete evidence and personal bias. However, in the second half, the same persistence becomes an asset, playing a crucial role in uncovering the truth about what happened. The novel ends with Benny reuniting with Joy both personally and professionally, as their creative projects blossom into a true partnership.

Xander is the primary antagonist of This Story Might Save Your Life. He embodies the theme Control Disguised as Love. Xander presents as protective and supportive of Joy, but actually exerts dominance over her life. He isolates Joy from external relationships, fakes a stalker to increase Joy’s paranoia, uses his sister to spy on Joy, and manipulates Joy’s perception of herself, particularly by framing her narcolepsy as a “burden” (173). His abuse is subtle at first but soon extends into both her physical environment and emotional autonomy.

Xander’s most significant form of manipulation lies in his ability to reframe abuse as care. After inflicting violence or emotional harm, he provides comfort, which creates a cycle in which Joy becomes dependent on him for stability. He also takes calculated steps to maintain influence over both Joy and Benny professionally by taking charge of the podcast’s business side. Xander makes secret deals and exploits the podcast’s earnings.

Xander abusive manipulation of Joy is the primary driver of the novel’s plot: Her disappearance is an effort to escape him; he is killed when Joy hits him in self-defense. His manipulations also contribute to the misunderstandings and confusion complicating the investigation: Xander creates false narratives around Joy’s relationships, separating her from Benny and controlling what she believes about others. This distortion of reality makes it difficult for Joy and Benny to piece together what is really going on.

Mallory, Xander’s younger sister and assistant producer on the podcast, plays a complicated role in the story. She’s deeply entangled in Xander’s web of control: She helps Xander by keeping tabs on Joy for him. However, Mallory justifies her actions as protection—as the childhood victim of Xander’s abuse, she believes that by being in Joy’s proximity, she can save Joy from the worst of Xander’s excesses.

Mallory’s reserved nature and careful words add a layer of uncertainty to her character. Because she holds back details and speaks cautiously, both Benny and the reader find her suspicious and possibly culpable. In Mallory’s case, the line between being a victim and an enabler is blurred. Her closeness to power complicates her sense of responsibility, showing how easily someone can be drawn into harmful systems without fully realizing the consequences.

Benny’s ex-wife Luna, a lawyer, plays a morally gray role in the novel, shaping events in ways that are often opaque. At first, Luna seems removed from the central mystery of Joy’s disappearance, she turns out to know everything about what’s happened, including Joy’s location and details connected to Xander’s death. Luna’s choices about when and how to dole out information directly affects Benny, whose choices are often driven by the anxiety of helplessness.

Luna’s actions are in part Control Disguised as Love, though her approach is not abusive like Xander’s. Luna frames her decisions as protective of Benny, yet her protection is infantilizing, as she chooses what he is allowed to know. Luna positions herself as capable of managing difficult truths on behalf of others, which subtly mirrors the logic of imposed authority and gatekeeping Xander sometimes invokes. When Luna eventually steps away after revealing Joy’s location, her character remains unresolved and difficult to fully interpret. Luna operates at the edges of the narrative, influencing outcomes without ever fully exposing her own motive.

Benny’s sister Sarah functions as a practical and grounding influence throughout the narrative. Unlike many other characters, she consistently seeks clarity, helping Benny sort through information when his perception is biased by stress. In doing so, Sarah pushes against The Unreliability of Perception and Memory, acting as a stabilizing presence when Benny misreads situations or leaps to emotionally charged assumptions.

Sarah’s role is not to solve the mystery of Joy’s disappearance, but to prevent Benny from collapsing under it. She encourages him to slow down, question his assumptions, and discard conclusions reached via circular or reactive thinking. This makes her an important counterbalance to the narrative’s broader tendency toward fragmentation and misinterpretation.

Sarah also supports Benny’s drive to Reclaiming One’s Voice. She does not attempt to shape or manage him, but instead repeatedly gently urges him toward communication and engagement with the world rather than avoidance, creating space for him to process what is happening instead of retreating into obsession or denial.

Joy’s neighbor couple is initially presented as highly suspicious; they turn out to one of the novel’s most important red herrings.

Emil’s photographing of Joy eventually unfolds into a more complex role within Xander’s system of surveillance. Shaped by Xander’s influence, Emil’s actions sit between coercion and complicity. Both Joy and Benny initially suspect Emil of being Joy’s sole stalker, assigning him a level of culpability that obscures his affiliation with Xander. When the truth comes out, Emil remains difficult to categorize. Although he was complicit with Xander’s poisonous protein shake investment, Emil calls in an anonymous tip to warn the podcast before it’s too late. After Joy kills Xander in self-defense, Emil offers to disguise it as a car accident to protect Joy. His character shows the complexity and multi-layered nature of human motives.

Carlotta is also a significant observer within the novel’s wider system of surveillance and withheld knowledge. Her awareness of the mistreatment Joy experiences connects Carlotta to the theme of Control Disguised as Love. Though moved to be helpful to Joy, Carlotta acts only indirectly: She notes Joy’s injuries without naming them as abuse or acting immediately. Instead, she suggests alternative ways to resist Xander softly. However, she is also responsible for conducting Joy to the safety of the domestic violence shelter, showing how extricating someone from a deeply emotionally manipulative dynamic takes subtlety and slow progress.

Mallory’s partner, Quinn, is a minor character whose primary role is providing background information about Xander and Mallory’s family. Quinn tells Benny about Mallory’s childhood illness and Xander’s role in caring for her. This either portrays Xander as a selfless caretaker or as a lifelong abuser, depending on whether he was responsible for prolonging Mallory’s illness. Quinn herself remains largely on the outside of major events and is often withholds information when questioned. She represents the partial witness: someone close enough to see dysfunction in relationships but not close enough to fully understand the truth behind them.