Spotted Greenwings are relatively small nocturnal dragons. Easily recognizable by the fleshy appendages growing off of their head and rump, they are most commonly seen in forests at night, leaping and soaring from tree to tree. While generally social, spotted greenwings are very quiet and rarely make any sort of vocalization. Their bodies are unusually warm to the touch, though they are unable to breathe fire. Greenwings are voracious feeders and will consume nearly any living thing that they can fit in their mouths.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Hyper, obsessed with space and talkitive, Space has been strange since his hatching. Nobody knows exactly why Space became so interested in his namesake, especially considering that he is neither a Nebula nor related to one in any way. Some dragons claim that the Core was bumped around in his egg too much and that he has a minor case of some serious brain damage.

Space cares not about what they say, too content to watch the stars or babble about wanting to go to space to Rick and Wheatley. The two other Cores usually just glance at each other and walk away, leaving Autumn to deal with him. This, to Autumn, usually means listening to him talk on and on and on about nothing but space, how he wants to see space, and what her favorite thing about space was.

Like Wheatley and Rick, Space claims to have been in the Aperture Canyons with GLaDOS at one point, until a very unfriendly Spitfire female tossed them out and told them to get lost.