The Kamen Rider G3-X figure features a dark, multi-layered armor design with a gunmetal base and contrasting accent colors. Meticulous sculpting highlights segmented plates, crisp panel lines, and a glossy finish that catches light along every edge. The helmet showcases a sharp, forward-leaning visor and integrated sensor crest, while the torso and limb armor display micro-textures that suggest reinforced protection. This S.H.Figuarts release includes multiple interchangeable hands and accessories, such as a firearm and effect parts, allowing dynamic poses that mirror action-packed scenes from Kamen Rider Agito. The overall silhouette is compact yet imposing, faithful to the on-screen look while optimized for poseability.

Within the Kamen Rider Agito universe, G3-X is a refined combat variant built on the foundation of the G3 system. Designed for street-level defense against emergent monstrous threats, G3-X emphasizes endurance, rapid targeting, and modular combat options. The character's ethos centers on disciplined containment rather than reckless assault, often acting as a stabilizing force when other Riders clash. In battle, G3-X adapts to shifting threats by swapping armor segments and weapons, a concept mirrored by the figure's interchangeable hands and accessory options, enabling collectors to recreate pivotal moments from the series.