We went through endless design iterations striving to nail down what all that meant visually.
One of the more memorable moments was when we hit a phase of ‘armourized’ Mothra.
For a moment in time her cocoon looked like a military tank.
In developing Mothra, our intention was to give her an essentially feminine power in contrast to the hypermasculinity of the other three creatures, and to imbue her with undeniable strength and grace plus an ability to be incredibly frightening at the same time.