The climate in Reality 537 isn't so good for humans: the constant temperature in there is -20°C. Voidroids feel comfortable enough in that condition, considering the fact that they shouldn't be overheated. And because of that their hands are unnaturally cold.

There are no sources of fire in Reality 537 - anything that produces even minimal amounts of heat is considered a threat to the residents’ safety, and thus only the permitted residents are allowed to carry matches and stuff like that with them.