[QUESTION]

But the point of the legionnaire example was completely different. It was about the fact that such armor existed and was used, and its creators clearly didn't think about making the soldiers look attractive.

Really? It existed and was used? I explained why it was the way it was, and not any other way. And I already said that some people went into battle completely naked. But that doesn't speak to its practicality or commonality. There was no such armor. No one made a plate breastplate on fabric, with holes in the plates, to make it easier to hit the nipples.

Yes, it's probably really a breastplate bra.
You can clearly see what she has on her chest, just look closer.

First, we don't see it, maybe she has a second set of breasts covered. Second, there are cases like this - a seraphim from Sacred. Third, in the vastness of the Russian internet, and in general, the term "armor bikini" is not common, but "armor bra" is. Are you aware of what a black box is in airplanes? The one that is deciphered if a crash occurs. And are you aware that it is actually an orange sphere? But the term has become established, and no one wants to or needs to change it.