Unlike the other Brave Police units, GunMax does not have a vehicle form, instead riding a large motorcycle called the GunBike. He originally came off as being overconfident, cynical and sarcastic, preferring to operate alone and shuns others. After his adventures with Yuuta Tomonaga and BP-110 Deckerd though, he began to open his heart and gradually became a team player.

Similar to the rest of the Brave Police, GunMax is armed with a standard-issue revolver.