The Kamen Rider Build RabbitTank Form figure presents a compact, battle-ready silhouette that combines agility with armored presence. The head crest has the iconic rabbit ears and a sharp helmet visor, while the torso and limbs are layered with interlocking armor plates that echo the Rabbit and Tank motifs. Fine sculpted details mimic vents, seams, and fine panel lines, with subtle color separation between the two Form components. The articulation points are visible at the shoulders, elbows, hips, and ankles, allowing dynamic action poses. The finish alternates glossy armor panels with matte accents, and the hands include swap options for gripping weapons and effect parts.

Within the Kamen Rider Build narrative, Sento Kiryu fights to protect humanity from the calamities caused by the Great World Disaster. The RabbitTank Form represents a strategic blend of speed (Rabbit) and heavy assault (Tank), reflecting Sento's dual approach to solving problems with science and courage. In battles, the form combines quick dodges with powerful charges, enabling him to outmaneuver stronger foes. This form is part of the larger journey to uncover the One Great Formula, rebuild the world, and restore lost loved ones. It symbolizes resilience, intellect, and the belief that diverse traits can unite to overcome catastrophe.