Green Impostor is a Green bean-shaped astronaut with floating hands. In the mod, they hold their mic in their left hand, and in their impostor form they wield a knife in their right. In their poses, Green Impostor is shown to have various items from among us such as a microphone, however in their impostor form they stick their tongue out in their right pose, make a shush pose in their down pose.

In Ejected, they take on a much more eldritch form as they no longer need to disguise. Their head grows in size, and sprouts horns, one of which is broken. Their visor also cracks and reveals a glowing red eye. They sprout tentacles out of their back, alongside with a much more tentacle-like tongue in a mouth of sharp teeth.