Gon is a beige-colored dog with distinctive black ears, tail, and a circular black marking around his left eye, though this marking varies across the franchise. Found alone as a puppy, he was adopted by the owner of a furniture store. His name comes from the onomatopoeic "Gon!", reflecting the sound of bumping into store furniture.

He displays a consistently calm and mature demeanor, serving as the de facto leader among the animals of Third Street. His laid-back approach to challenges includes reassuring others with his signature phrase that "things will take care of themselves." This wisdom and reliability make him a mentor figure, often imparting lessons during misunderstandings or difficulties.

Intellect is central to his character, emphasized in anthropomorphized adaptations where he wears thick rectangular-rimmed glasses. He typically observes the neighborhood from his habitual spot in front of the furniture store.

His closest companion is Kuro, a black and energetic dog. Their bond is consistently highlighted across media; the two are rarely apart and described as having a "heterosexual life-partners" dynamic due to their inseparable nature and complementary personalities. His role remains steady as a stabilizing and guiding presence within the group through their shared adventures.