With the Interior's previous designs being both heavy and having relatively poor PA values, the Interior design team began construction on the RIGEL as an attempt to make create a lighter version of the Y01-TELLUS as well as a workbench to test out new PA systems and rectifiers. After TORUS was selected to provide generators, the company also decided that the race in Kojima technology and the increased KP output of the new generator, they made an agreement with TORUS for a new KRB system, making the RIGEL the Union's first craft equipped with the system.