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I believe Gothitelle's "hairstyle" is meant to look like radio antennae, because of the space observation theme hinted in the pokedex entries of the line.
At the same time, I remember an anon years ago believing it's meant to look like a lotus flower to represent enlightement, with the ribbons as the chakra points.
Combining these two ideas, it's like these pokemon blur the line between science and cosmology, and ties them up with the themes of gothic lolita fashion.