The son of the legendary Hunter Gin Freecss, Gon was left in the care of his aunt since infancy, his father was never heard of since. During his youth, Gon met another Hunter, Carter, who was once Gin's apprentice. That fateful meeting made Gon all the more intrigued to meet his father, and also gave him the hope and inspiration to take the Hunter license.

A naturally optimistic youth, Gon's friendliness and innocence has charmed and won many trusted friends to his side, including Kurapica and Kihlua. With an uncanny and extraordinary sense of smell, taste and hearing, Gon's instinct has aided his friends through many tough obstacles during the Hunter exam. Gon has another remarkable talent, being able to talk to and befriend with animals easily.

Gon has an unusual choice of a weapon, which is a fishing rod. Though it doesn't deal much damage to his enemies, Gon is able to accurately swing and 'hook' it onto targets, proving itself to be useful time and time again.

Out of the 6 main nen types, Gon proves to be a Kyouka which is a ‘Strengthen type’. People belonging to such a category excel in attack and defense, and also have the ability to heal themselves quickly. Building on this type, Gon has sharpened his use of nen, and has managed to increase his attack power with his fists, dealing more damage than before.