Anthro is the common term for anthropomorphous animals (animals with human characteristics) and for humanoids with extensive animal features. In Star Army, anthros are usually bipedal and capable of human speech and have roughly the same mental capacity as human beings. Unless they're part of an existing species, Anthros are generally described as the animal they are based on or most closely resemble; for example: Anthro Wolf.
Most types of anthro characters, within reason, will also be accepted. Since there's no anthro faction, we want these characters to be already assimilated into some existing faction.
We'd like to avoid you having to invent an entire new species just to make the character you envisioned. Some encouraged explanations for the origins of anthro characters are:
Anthros typically share common cultures with the humanoid groups around them. This section breaks down attitudes and ideas for anthros by faction.
The Democratic Imperium of Nepleslia has a significant subsection of its population that consists of random mutants and aliens, and Anthros blend in with them but may face some racism.
Anthros are generally well-accepted in the Yamatai Star Empire.
The Minkan body also supports anthro features as customization options.
In addition, there are several species in Star Army that could be classified as anthro, at least in appearance:
Note the above are technically not anthros, they're aliens.