The Back Dimension (裏次元 Ura Jigen) is a dimension that is the exact opposite of the dimension considered as the main universe in the Super Sentai series. Beings from this dimension refer to the main universe as the "Front Dimension" (前部次元 Zenbu Jigen). Radiguet hails from this dimension. While the Dimensional War Party Vyram invaded and annihilated all life and existence within the Back Dimension before deciding to invade the Front Dimension, some people of the attacked worlds survived, and journeyed to the Front Dimension to aid them in their battle against Vyram, mostly allying with the Jetman.