Gunma is a male character from the anime Papuwa, recognizable by his distinct appearance which includes blonde or yellow hair that reaches his chest and blue eyes. He is formally referred to as Dr. Gunma, indicating a level of expertise or professional standing within the story's world. His background is tied to the Gamma organization, where his lineage is a matter of some complexity; he is eventually revealed to be the eldest son of the leader, Magic. This places him as an important figure within the group's hierarchy, moving beyond initial assumptions about his origins.

In terms of personality, Gunma is characterized by a certain purity and a childlike innocence that stands out against the more chaotic elements of the world around him. He is rarely seen making grand pronouncements about his own importance, a trait that distinguishes him from some of the more overtly flamboyant or self-absorbed characters. Rather than seeking admiration for his looks, he tends to focus on practical matters, applying himself to technical, combat, and administrative duties. Despite his competence, he is not infallible; his cheerful smile and pure heart can provide a moment of respite even in the midst of more serious situations. This innocence extends to his work as a scientist, where his inventions are known for being creative, quirky, and elaborate in design.

The most significant relationship in Gunma's life is with his adoptive parent, Doctor Takamatsu. Their bond is portrayed as very close, with Takamatsu often openly praising Gunma as handsome, precious, and young and beautiful. A recurring and endearing detail about their relationship is their shared love for udon noodles, though their preferences differ; Gunma is a firm believer in firm, chewy noodles, while Doctor Takamatsu prefers them soft, a topic on which they happily and stubbornly disagree. Beyond this familial connection, Gunma shares a complex history with Kintarou. After an initial period of conflict that included battles against a manipulated father, the two ultimately reconcile and are often seen working together. As fellow scientists within the Gamma organization, their contrasting styles are frequently highlighted, with Kintarou's inventions being simple and efficient while Gunma's are fanciful and uniquely designed. Gunma affectionately refers to Kintarou as Kin-chan, and the two are known to operate as close companions. He also appears as a recurring cast member alongside the dog Chappy, suggesting another key association within the island's community.

Gunma's role in the story is primarily that of a supporting character who provides scientific and tactical support. He is a member of the Gamma Army and, as a scientist, his abilities lie in creating various inventions and contraptions, although his designs are often characterized by their unusual and decorative flourishes. His development sees a shift from being in a position of conflict with characters like Kintarou to becoming a trusted ally and collaborator, finding his place within the organization's scientific division alongside his former rival.