Here's my own interpretation of a 'Shin Godzilla' version of well-loved moth kaiju, Mothra (Mosura). My thinking behiond this wasn't anything revolutionary. There was a discussion here about what exactly Shin versions of other kaiju might look like. Most of them take the exact same approach as Godzilla: terrifyingly deformed and twisted, but with the advent of Shin Ghidorah, which fits the Shin 'aesthetic', but is most definitely King Ghidorah, the point came up that these deformed monsters were in fact missing the point. Shin Godzilla's design is the 1954 design followed through to its logical conclusion, ergo Godzilla becomes a horrifyingly deformed victim of the atomic bomb.

I wanted to take a similar approach to Mothra, where if you took a look at it you could say 'Mothra' but upon further inspection you would notice some differences. Whereas Godzilla is twisted, Mothra would be almost regal in appearance. I'm not sure I quite got that across here, but I tried going for a similar 'through to its logical conclusion' design for Mothra. Whereas the MonsterVerse incarnation (which I love, BTW) was more 'combat focused' my idea for Mothra would be a mythical goddess of healing. She loses the poison scales, instead her scales contain healing properties (more fitting of a benevolent Goddess). Mothra would be seen as a lost Goddess of Nature. Her ancient rivalry would be with King Ghidorah, as it was with Death Ghidorah in the Rebirth of Mothra trilogy.

I wanted elements to be callbacks to real-life moths, so Mothra here has longer and thicker legs (as the original Mothra's legs were quite short and fragile-looking in many of her appearances and would most certainly be unable to support her weight), more feathered antennae and a less ant-like body if you were to remove the wings. Her eye shape was inspired by Mothra Leo, her son from the Heisei Rebirth Of Mothra trilogy.

I used reference pics of real moths, and the Bandai Movie Monster series Mothra figurine for the markings.