Gon Freecss is the main protagonist of the story, a boy who grew up on the remote and naturally rich Whale Island under the care of his aunt, Mito. From infancy, he was led to believe his parents had died in an accident. This belief was shattered at the age of nine when he met Kite, a professional Hunter and a student of his father, Ging Freecss. Kite revealed that Ging was not only alive but also a legendary Hunter. This revelation ignited a powerful desire within Gon to leave his home, take the arduous Hunter Examination, and find his father to understand what could be so important that a man would abandon his own son.

Gon possesses a personality that is both disarmingly simple and profoundly complex. On the surface, he is an athletic, friendly, and incurably optimistic boy who is deeply connected to nature and has a remarkable affinity for animals. His senses, including smell, sight, and hearing, are exceptionally acute, honed by his childhood spent in the wilderness. This pure and straightforward nature allows him to easily attract friends and allies, as he looks for the best in people without prejudice. However, this simplicity also masks a stubborn, impulsive, and even dangerous side. Gon has a fierce temper and a near-total inability to give up on a goal, even when it may cost him his life. His morality is highly subjective; he does not judge people by conventional standards of good and evil. While he values life, he can express admiration for killers like Hisoka and Killua and show ruthless fury towards those who harm his friends, revealing a stark inconsistency rooted in a childlike worldview where his own attachments define right and wrong.

Gon’s primary motivation is to find his father, Ging Freecss. This quest is the driving force behind all his actions, from becoming a Hunter to training his body and mind. He does not simply seek a reunion; he wants to understand the source of Ging’s passion for being a Hunter, a profession his father chose over raising him. This desire is tied to a deep-seated insecurity about his own worth and a desperate need to prove he is not a disappointment. He desires strength above all else, not for power's sake, but to protect those close to him and to never again be the reason a loved one is harmed.

Throughout his journey, Gon forges crucial relationships. His most significant bond is with Killua Zoldyck, who becomes his best friend and constant companion. Their friendship is the emotional core of the story, with Gon’s open and trusting nature helping to free Killua from his family’s dark influence. He also forms lasting friendships with fellow examinees Kurapika and Leorio.

Gon’s development is marked by a constant struggle to gain power, which eventually leads to a catastrophic fall. After failing to save his friend Kite from the Chimera Ant Neferpitou, Gon is consumed by guilt and rage. In a moment of utter despair, he uses a Nen contract that imposes a severe restriction and vow to gain enough power to defeat Pitou, sacrificing all his future potential and life force in the process. This transforms his body into an adult-like state of immense power but leaves him near death. He is later saved by the extraordinary abilities of Killua’s sister, Alluka, but the ordeal permanently strips him of his Nen abilities, forcing him to return to Whale Island a normal boy.

Gon is a natural Enhancer, a Nen type that augments his own physical abilities, granting him immense strength, speed, and an accelerated healing factor. His signature ability is Jajanken, an attack style inspired by the game rock-paper-scissors. Rock is a close-range, powerful, reinforced punch. Scissors is a mid-range attack where he transmutes his aura into a sharp blade. Paper is a long-range emission-type blast of energy. Before learning Nen, he was already a formidable fighter, relying on his heightened senses, incredible physical resilience, and a fishing rod that once belonged to his father, which he wielded with spectacular precision.