Naoya Shikijou initially presents himself as considerate, forming a connection with Kotonoha Kanade through their shared experiences of social rejection for perceived quirkiness. This common ground positions him as a seemingly understanding partner for Kanade, who struggles with her desire for normality stemming from past maternal criticism over unconventional interests like a blue backpack or a crush on her teacher. Beneath this empathetic surface, Naoya harbors manipulative tendencies. He exploits Kanade's insecurities not to foster self-acceptance, but to mold her into his idealized romantic partner. His control escalates, dictating her appearance, social interactions, and personal expressions to fit his vision of perfection, contrasting sharply with others' acceptance of her identity. At the Saitama University festival, after Kanade rejects him upon realizing her lack of genuine feelings and her pursuit of a relationship for perceived normality, Naoya's true nature erupts. He incapacitates Kanade with a taser, transports her to a remote location, binds her, and—aided by associates—subjects her to physical confinement and psychological intimidation. He monologues his motives while threatening further harm, including implied sexual assault. His aggression turns violently on one associate who prematurely advances toward Kanade. This escalates into a hostage situation where Naoya justifies his actions through a warped sense of entitlement and possession. External intervention resolves the confrontation, leading to his arrest. His actions serve as a narrative device challenging Kanade's development, forcing her to confront the dangers of compromising her identity for acceptance. Naoya's background includes prior association with the group of pick-up artists who harassed Ayame Himuro during an Okinawa research retreat, indicating a pattern of predatory behavior toward women. His minions, who assist in the kidnapping, reflect his influence over similarly misogynistic individuals. His character arc functions as a dark counterpoint to the series' typically lighthearted exploration of romance through scientific inquiry, highlighting themes of toxicity versus healthy relationships. His downfall facilitates Kanade's emotional growth, reinforcing the series' message about self-worth and the validity of individual differences.