Naoto shares a childhood history with Shuichi Kagaya, Kaito, Honoka, and Elena Aoki, forming a close group before the story's events. Their shared past includes encounters with the alien entity distributing wish-granting coins, a dynamic shattered by tragic misunderstandings and the coins' misuse. He possesses a monster transformation ability resembling a mascot suit, akin to Shuichi's, though its specific appearance and combat capabilities remain undefined. Demonstrating a pragmatic and strategic mindset, Naoto aligns with Elena. He joins her mission to infiltrate the alien spaceship protected by Kaito, who gained immense power from 100 coins to resurrect Honoka. Naoto questions Kaito's motives and suspects links between the spaceship's protector and their group. Naoto proves observant and morally aware. He recognizes the resurrected Honoka as monstrous and no longer human. He also expresses skepticism about the alien's emotional capacity, noting its visible sorrow when Honoka vanished. His involvement stems from a desire to resolve the chaos caused by the coins and Kaito's actions. Surviving the series, he is shown one year later navigating a world where knowledge of the coins is public. He maintains awareness of ongoing struggles, observing the lingering threats posed by the coins and the entity within Shuichi. His relationship with Elena is one of alliance and shared history. They work together to confront Kaito, driven by their understanding of past events involving Honoka's death and resurrection. Naoto witnessed the pivotal moment where Kaito, misunderstanding Honoka's transformation into Aiko (a deceased friend), strangled her in rage and despair. This event solidified Naoto's view of Kaito's destructive extremism. In the conclusion, Naoto's role shifts to that of an observer. He remains aware of Shuichi's condition—sealing the entity Honoka had become within himself—and Clair's efforts to support him. He witnesses their return to confronting the dangers stemming from the widespread knowledge and misuse of the coins in the aftermath.