Guntz, also known as Gantz outside Japan and Europe, is a dog-like character from the Klonoa series who made his first appearance in Klonoa 2: Dream Champ Tournament. He is a legendary bounty hunter with a very short temper, and he is somewhat arrogant. Guntz is sometimes referred to as the Golden Killer, or the Golden Death. He uses a variety of guns and fire arms to attack, and he often travels in a red hover-bike, called Red Clan.

Guntz is a teenager, being likely depicted around the ages of 16-18. He has a somewhat feminine appearance and has long black hair tied back into a ponytail, a tradition amongst warriors or royalty of Japan. He wears a grey outfit with a bullet belt around his waist, a red jacket, long-fitted gloves, black boots with red straps, and a pair of goggles. He has black fur with yellow markings, sapphire blue eyes, large ears, and a more mature look to his appearance than Klonoa. In the Legend of the Star Medal Official Strategy Guide, he was identified as a wolf.

Due to the nature of Guntz's childhood, he's allowed himself to become more of a loner. Thus, he doesn't interact with others very well. He becomes shy and awkward around females, but is mature and more cold towards males. But he's shown to be a very loyal friend, even if he prefers to keep others at a distance. He's also been known to have a very short temper. In Namco x Capcom and Klonoa Heroes alike, he is shown to swear and curse a lot, especially at Janga, his enemy. Other than that, he is generally viewed as 'very handsome'.