Technology & Combat Characteristics
Riku's machine is a Gunpla based on the 00 Gundam. He personalized it by mixing the best parts of the original kit with customized parts, and applied a new blue and white color scheme based on those of sports uniforms. Antennae are added to the Gunpla's head, and its sensor functions are enhanced, but Riku made these changes simply because they looked strong. He also adjusted the usability of the Gunpla's close combat specialized weapons to suit his needs, and attached verniers and wings to the bases of the cone thrusters, boosting the Gunpla's mobility unexpectedly close to that of the GN-0000+GNR-010 00 Raiser's. Overall, the Gundam 00 Diver's performance has a surprisingly good balance of offense and defense; it also reflects Riku's great taste in Gunpla. However, as noted by Shahryar, Riku's lack of building skills resulted in his inability to fully materialize his ideals for the Gundam 00 Diver.
History
History of the Gundam 00 Diver can all be found on Riku Mikami's page