Leotard Warrior Girl

While some Nichibutsu arcade flyers have scantily-clad ladies in them, the two flyers for Sei Senshi Amatelass with the leotard-clad girl are actually modest by fanservice standards.

Here is what the Sei Senshi Amatelass arcade flyer looks like:

And here is another flyer for Sei Senshi Amatelass:

If pop culture historians want to know where the cosplay conventions of the the last 25 years have their roots in, the leotard-clad girl in the Sei Senshi Amatelass arcade flyers is the real reason cosplay conventions became so popular in multiple places, most notably Comiket.