Kamen Rider Gridon is the Rider form used by Zack, a recurring character in Kamen Rider Gaim. Zack is a member of Team Baron and later becomes an important supporting ally in the series’ conflicts over the Lockseeds and the Helheim Forest threat. He is portrayed as energetic, loyal, and charismatic, often serving as comic relief while also showing strong determination in battle. As Gridon, he fights using the Pine Arms and contributes to the larger struggle among the Riders.