Thank you to @rickyriddle for translating this and sending it to me! This is an excerpt from a doujinshi called Choko Choko (fully scanned on Three Lights) that shows the background of the photo of Lead Crow and Aluminum Seiren together. I absolutely love these two (both as individual characters and as a pairing) so I’m really glad I was able to typeset this comic!
In an alternate reality, Sailor Galaxia defeats the Senshi of Earth, and gifts Naru, Sailor Moon’s silver crystal and Naru becomes a Sailor Animamate, Sailor Silver Rabbit.
The Sailor Animamates are made to wear lingerie-like outfits by Galaxia in a bid to assert her domination over them. The more “naked”, vulnerable or demoralised/humiliated they feel, the better for Galaxia to keep them humble and fearful of her. Kind of like a tyrant ruler who revels in humiliating those lesser than her by reminding them that they are essentially naked and thus powerless in her presence. Phi and Chi are allowed to cover up more of their body because they earned Galaxia’s respect to some degree.
The metal in the Animamates name refers to their home planet Sailor Crystal. Chuu has the Iron Crystal, Mermaid the Aluminum Crystal, Coronis the Lead Crystal and Mau the Tin Crystal. An Animamates from the Moon Kingdom would have silver has metal and one from Earth gold.
Extra solar Sailor Guardians don’t look remotely human, but their power allows them to be seen as the same species as the viewer. Nyanko and Mau look kind of like the na'vi from Avatar (but not blue and with a different cultural aesthetic) - Luna, Artemis, and Diana don’t look like this because they were given truly human (or rather, Silver Millennial) forms. Siren and Mermaid have lots of tentalces and lobster-like shells. Papillion and Cocoon have four arms, no breasts, and insect-like abdomens and exoskeletons. Galaxia is a beautiful but terrifying eldritch horror. I haven’t decided what the others look like.
The planets Chuu and Mau are in the same solar system. (This makes sense to me since mice and cats are both small mammals typically kept as pets)
The planets Mermaid and Coronis are also in the same system as each other, but not the same as Chuu and Mau are. (This makes sense to me because Aluminum Siren and Lead Crow had similar fuku designs)