Crewmate

An unnamed species of diminutive alien humanoids, identified as Crewmates to distinguish them from the monstrous Impostors plaguing their space program. This space program is the only observed aspect of Crewmate society.

Biology
While little has been observed about these creatures, they are clearly distinct from Humans. As they stand 3 feet and 6 inches tall, which is much shorter than the average human.

It's also known that they are skilled with technology and can manipulate it to cause madness.

They also are shown to breathe oxygen or O2.

Apparently, they also have hidden floating hands, possibly inside their bodies which they put out to perform tasks.

It is unclear if they're wearing spacesuits, or they have spacesuit-like bodies.

Culture and society
This species prefers to communicate by written language, and might not have a spoken one. They are also known for killing their own members with no apparent remorse, although this could be due to an extreme focus on their survival, or merely unable to be seen due to their inexpressive space suits and bodies.

The majority of their technology is identical in appearance and sophistication to its human counterparts. Crewmates possesses all the necessities of easy interstellar travel, and their teleportation technology can move living beings into a moving spacecraft. They also have the technology to stabilize seismically active surfaces. They also have computers so advanced that with a simple touch you can change them, and send you things like clothes, objects, animals, among others all by computer. They also have the technology to identify Impostors from other Crewmates, but cannot use this tech unless tasked to do so.

The purely scientific aim of the Crewmate's space program makes it unprepared for the gruesome events that plague it. It follows an anarchic form of labor organization, where all members are given an equal amount of labor by their electronic systems without hierarchy.

They stand out as one of the few species to successfully domesticate Headcrabs without being turned into Headcrab Zombies. Having created a friendly variant called the "Bedcrab". They also keep pet Brain Slugs, implying they're immune to mental control.

Appearances

 * Among Us                                                                                      
 * Henry Stickmin: Completing The Mission