The ShodaiMosuImago would set the tone for all of the Mothra imago designs to follow. The prop's body is mostly white in color, with several orange spots, most notably on the top of its head.
The body is very thick and rounded, and the legs are very thin and scrawny and are held close to the body. The ShodaiMosuImago's face is flat and its mandibles are very small. The eyes are ovular in shape, and are blue and surrounded by a black outline. For scenes of the imago Mothra flying in the distance, Mothra was portrayed through animation.