Body Modification

Tattooing is hard enough to implement with fur, but when you add in regenerative nanotechnology, body modification in general gets a bit difficult.
By default, medical microbots are set to maintain the body in peak physical health, which includes ejection of foreign bodies.  When implants such as the microbot hive that produces and maintains the microbots or a BCI are inserted they have RFID tags that the microbots are set to ignore.  Most other discrete implants like telescoping ocular lenses or ornamental piercings can be similarly tagged but more spread-out insertions require more delicate work.
It’s fairly common for parahumans to reinforce their skeletons with titanium alloys, similar to the frames that the first generation bioprinted parahumans were built around, this requires the use of specialized microbots to implement in the first place.  Once the metals are in place the patient’s symbiotic microbots need to be updated to consider the titanium reinforcement a part of the healthy body.  Similar updates can be used to allow for artistic scarification, branding, or even to incite the microbots to alter the pigmentation of one’s fur in specific patterns.
On Outworlds, many cultures practice the body modifications that can work with fur feathers or scales for the usual variety of reasons, freeze brands  are popular on worlds that can maintain the technology.  In the Federation pigment shift “tattoos” are popular in some circles, in particular among traders who like to show off their technology to Outworlders.  Some worlds feature youth countercultures who like to adopt “old-fashioned” body mods to mimic Outworlders, sometimes even inflicting scars that look “natural” if they want to look “tough.”
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Trope-a-Day: Xenofiction

Xenofiction: Honestly, most of the short stories written in this universe qualify.

 Inside the Chinese Room is told from the perspective of an artificial intelligence that doesn’t think like a human, if it thinks at all.

Of the Collective (chap 1, chap 2, chap 3) shows a collective consciousness’s multiple simultaneous points of view.

And A World Lost kind of makes the Federation look like aliens.

Well, that’s the end of the list of tropes I have on TVTropes, feel free to suggest more.

Trope a Day: Uplifted Animal

Uplifted Animal: In addition to modifying humans with animal genes, some of the corporations that created the first parahumans uplifted fairly intelligent animals that might be considered useful in microgravity. Apes were obvious with their four “hands”, octopi for similar reasons; dolphins, parrots, ravens, and sea lions were a bit less apparent due to their lack of manipulators but their ability to think in three dimensions was deemed invaluable and the corporations wanted to experiment, for IP reasons really.

Twin Telepathy

Twin Telepathy: Somehow, monozygotic siblings sometimes share entangled particles in their nervous systems that allow a degree of thought-sharing. And unlike normal q-comms there isn’t any known limit to the number of times those particles can be “used”.

The House of Silver has been known to use chemical and/or nanotechnological agents to induce twinning in embryos so as to overwhelm the market for unlimited-use FTL communication.

Trope a Day: Terraform

Terraform: The majority of planets colonized by the Federation had no native biospheres of note when discovered, including two of the three Core Worlds.  While it took over five centuries to terraform SecLand advances in nanotechnology have given shirtsleeve environments to other planets in less than a single century, often while the colonists are still in transit.

There’s some debate on whether Outworlders should be sent to inhabitable or terraformed planets.  When the program started the concern was about “wasting” inhabitable planets on exiles, now those who object to dumping them on inhabitable planets are either concerned for the welfare of the involuntary colonists or the environments they’re being inflicted upon.  After all, just because one can survive in an environment without an enclosure suit doesn’t mean its’ friendly.