Chapon is the central character of the 36th film in the series. He is a mysterious boy whose sudden arrival sets the story in motion, appearing when he falls from the sky with no memory of his past or where he came from. He is a youthful and earnest figure, characterized by a strong sense of admiration for the hero Anpanman, whom he comes to idolize like an older brother. His appearance is notable for his blue hair, which features two distinct cowlicks that resemble a fountain, and his blue eyes and pink cheeks. He typically wears a blue shirt with light blue sleeves featuring a teardrop-shaped symbol, a yellow belt, white pants, and light blue shoes, and he adopts a brown cape similar to Anpanman's when joining in heroic efforts.

Chapon's personality is defined by his inherent kindness and his desire to be useful to others. As he spends time with Anpanman and his friends, he learns the joy that comes from helping people and making them smile. This experience fuels his primary motivation: to become a hero himself, following the example set by Anpanman. His journey is not just about performing heroic deeds, but about understanding what it truly means to be a hero and choosing his own purpose in life.

In the story, Chapon serves as a protagonist whose development is closely tied to a core conflict. The villainous Baikinman holds the secret of Chapon's mysterious origins and arrives to cause mischief by revealing this shocking truth to him. This revelation forces Chapon into a central emotional and philosophical struggle: he must determine whether his unknown past defines who he is, or if the person he dreams of becoming has the power to shape his future. Ultimately, he makes the determined choice to define his own existence, leading him to team up with Anpanman to confront Baikinman.

His key relationships are central to the plot. His bond with Anpanman is one of deep admiration and mentorship, as he learns about heroism and compassion. Conversely, his connection to Baikinman is defined by antagonism and the manipulation of his past. Although specific named abilities are not detailed in available sources, his most notable traits are his courage and his willingness to learn. He is capable of assisting Anpanman directly in adventures, and his strong will allows him to challenge the villain's attempts to define his identity. His development throughout the film is a classic hero's journey, moving from a state of amnesia and vulnerability to one of self-affirmation and purpose, deciding to actively choose his own meaning and path forward.