Early on, Denji is fatalistic and docile, conditioned by abuse to obey without agency. Fighting devils is not a noble duty, but a mechanical means to survive. He matures from crude, superficial physical cravings (like groping or porn) toward a deeper yearning for emotional intimacy, mutual vulnerability, and familial bonds with Aki and Power. His mind walls off the repressed guilt and trauma of killing his father behind a literal closed door in his psyche, symbolizing how unaddressed trauma stunts his emotional intelligence. His obsession with Makima stems from mistaking control, grooming, and basic physical proximity for affection. He gladly surrenders his autonomy to a master who treats him like a dog, mirroring his childhood with the Yakuza. The tragedies inflicted upon him—losing Aki and Power—shatter his fragile understanding of family. when pushed to emotional rock bottom, he frequently backslides into self-destructive coping mechanisms and base impulses, wrestling with developmental arrest and the weight of his Chainsaw Man celebrity status.Ultimately, Denji is a brilliant, tragic portrait of unhealed trauma—simultaneously intensely empathetic and emotionally stunted—stumbling through a chaotic world just to figure out if he is allowed to want a real, self-determined life.

As the Control Devil, Makima cannot form genuine, equal relationships. Because she views everyone else as inferior or as mere "dogs" to be ordered around, intimacy is impossible for her.She craves a family or an equal bond, yet her very nature destroys any chance of equality.She isolates herself by treating people as tools while secretly yearning for the unconditional connection she projects onto Pochita (the Chainsaw Devil).Manipulation of DenjiMakima’s treatment of Denji is a masterclass in psychological control using basic human needs.She lifts Denji out of poverty, offering him food, shelter, and affection, making him entirely dependent on her.She intentionally fosters his attachments to Aki and Power, only to systematically strip those relationships away when she needs to break his will to live.Her ultimate plan requires crushing Denji's contract with Pochita so she can subjugate the true Chainsaw Man. While she functions as the primary antagonist, Makima operates under a twisted utilitarian framework.She works for the Japanese government to suppress threats and maintain societal order.She sees her ruthless actions as a necessary cost to create a better world without bad things like war or death.Her defeat by Denji is tragic because he beats her not through hatred or traditional justice, but by consuming her with genuine love.

Power starts the series acting more like a wild animal than a human. She cares only for blood, blames others for her mistakes, and betrays people without a second thought. She calls herself a genius and a supreme fiend, masking deep insecurities and a fear of losing control. Her love for her pet cat, Meowy (Nyako), is her first real emotional anchor. It proves she can care for something outside herself. Living with Denji and Aki forces her into a domestic routine. They become a messy, chaotic "found family" that slowly softens her rough edges.

Aki’s entire existence is defined by the loss of his family to the Gun Devil. His pursuit of revenge dictates his contracts and shortens his lifespan, functioning as a psychological prison. His meticulous morning routines, neat apartment, and crisp suit represent an attempt to maintain control over an internal world shattered by trauma. Beneath his cold demeanor lies deep empathy. Users on Reddit reach a consensus that Aki's foundational kindness is shown through domestic acts—cooking, cleaning, and worrying over Denji and Power—transforming him into a reluctant older brother. Himeno introduces him to human connection and the reality of mourning. Her death shatters his emotional armor, proving that his stoicism cannot protect him from loss. Bonds with Denji and Power shift his priority from vengeance to protection, rendering his eventual doom even more heartbreaking. Manipulated into becoming the Gun Fiend, his final psychological perception reduces his tragic, violent end back to an innocent snowball fight with his lost brother—symbolizing a desperate reclamation of his stolen childhood.