Gian, whose full name is Takeshi Goda, is a central character in the Doraemon franchise. His nickname is derived from the English word giant, a reference to his large, imposing stature compared to his peers. He is typically recognized by his strong build, tan skin, and black hair. In the film Eiga Doraemon: Nobita no Chikyū Symphony, Gian takes on a specific role that utilizes his most infamous personal trait: his powerful lungs.

In Eiga Doraemon: Nobita no Chikyū Symphony, Gian is assigned the tuba by Doraemon. This choice is a direct reflection of his physical strength and lung capacity, making him naturally suited to an instrument that requires significant breath control. Throughout the adventure, he joins Nobita, Shizuka, Suneo, and their alien allies on a mission to generate Fare Energy, a power created through musical performance that is needed to revitalize the spacecraft known as Fare Hall of Farre.

Gian’s personality remains consistent with his portrayal across the wider series. He is known for his aggressive and domineering behavior, regularly intimidating others, particularly Nobita, and taking their belongings under the pretense of borrowing them. He possesses an unshakable overconfidence in his talents, most notably his singing voice, which is objectively terrible and often causes physical discomfort or nausea in those who hear it. This same self-assurance extends to his cooking. Despite these negative traits, a crucial aspect of his character is his deep-seated loyalty. When his friends face genuine danger, he does not hesitate to use his physical strength to protect them, proving that his aggression often masks a strong sense of camaraderie.

His key relationships are complex. He maintains a volatile friendship with Suneo Honekawa, who frequently acts as his indulgent sidekick. With Nobita Nobi, his dynamic is a mixture of relentless bullying and unexpected concern; he regularly beats up Nobita for perceived failures but is also often the first to support Nobita's decisions during a crisis and has saved his life on multiple occasions. He is fiercely protective of his younger sister, Jaiko. The only person who can truly control Gian is his mother, who runs the local grocery store and enforces strict discipline. He is also terrified of her.

In Eiga Doraemon: Nobita no Chikyū Symphony, Gian’s character development is tested when the group attempts to cure Doraemon, who has been infected by noise spores. At first, Gian falls back on his bad habits, blaming Nobita for the team’s failure to coordinate their music. However, this conflict is eventually resolved, leading to reconciliation among the friends. In the film’s climax, Gian contributes to the performance of the Earth Symphony, a collective musical effort that successfully repels the antagonistic Noise entities from Earth. Beyond his physical power and musical lung capacity, Gian’s most notable ability remains his unwavering, if misplaced, confidence in his own terrible performances.