The thing about Gundam: the Witch from Mercury is that it is simaltaneously very chaste but also kind of lowkey thirsty.
Like, despite it being very anime, there is next to no fanservice. The closest you're going to get are Secelia, Shaddiq, and I guess Renee showing a little more skin than everyone else, and even then the camera doesn't really treat them differently than anyone else. The most "titillating" focus you're gonna get is maybe a close-up of Mirorine's legs, and even then it's just barely.
But there is still this deep sense of yearning between Suletta and Miorine that becomes more and more pronounced as the series goes on. They never do anything all that physical, but you can really feel it with the glances and how they act around one another.
And the fanartists have really picked up on this.
Basically, what I'm saying is, whenever I see fanart of the characters in sexy poses wearing revealing clothing with exaggerated assets, it just feels off. Almost as if was made because they kind of have to.
But by the same token, the really dedicated fanartists, most of which I am pretty sure are sapphic, have all agreed that Suletta and Miorine are absolute freaks in bed. And I appreciate that.