Gian, formally named Takeshi Goda, dominates his neighborhood with his imposing size and aggressive conduct. He routinely intimidates fellow children, especially Nobita, confiscating their toys and comics under the guise of borrowing. His physical prowess cements his self-declared leadership among local youth, and he captains a baseball team called The Giants. The team consistently underperforms due to the limited athletic abilities of members like Nobita and Suneo, and Gian often vents his frustration over losses by attacking his teammates.
Despite his bullying, Gian exhibits stark contradictions. He possesses unshakable confidence in his atrocious singing voice and culinary skills, forcing others to endure concerts or meals while misinterpreting their visible distress as admiration.
Gian’s family life reveals complexity. He displays profound fear toward his mother, who runs a grocery store and physically disciplines him for neglecting chores or bullying others—her voice alone triggers his immediate retreat. Conversely, he demonstrates fierce protectiveness toward his younger sister, Jaiko, meddling in her affairs despite her irritation. He champions her comic-writing ambitions, occasionally commandeering Doraemon’s gadgets to aid her, though his tactics frequently backfire.
His friendships are multifaceted. Gian treats Suneo as a subservient ally, their dynamic oscillating between camaraderie and exploitation—Suneo shares homework or snacks, yet Gian may assault him. With Nobita, Gian alternates between relentless torment and sudden loyalty. He famously claims bullying Nobita is essential to his own well-being, yet during crises like blizzards or illness, Gian reveals authentic concern, rescuing Nobita from peril or aiding him when he collapses.
In "Stand By Me Doraemon," Gian’s actions escalate during critical events. He deceives Nobita with a false promise of Doraemon’s return on April Fools’ Day, provoking Nobita to deploy a truth-altering potion in retaliation. Later, when Nobita seeks to prove self-reliance before Doraemon’s departure, Gian instigates a savage fight. Though Gian overpowers him, Nobita’s refusal to surrender exhausts Gian, leading him to concede—a subtle nod to Nobita’s determination.
Gian sporadically exhibits cruelty toward animals, attempting to harm rabbits or tanukis until Doraemon intervenes. His care for his dog, Muku, remains low-key; he seldom attends to it directly but has shown underlying affection.
Throughout his experiences, Gian experiences fleeting moments of self-reflection. After friends avoid his birthday due to his selfishness, he questions his unpopularity and seeks Doraemon’s aid to change. Yet when Suneo ridicules his reformed behavior, Gian’s temper flares, causing him to revert to aggression—highlighting his struggle between craving acceptance and being shackled by impulsivity.