Roleplay Elements is a racial trait meant to be used in roleplaying games of SE4. Most of them do nothing but add flavor, such as having distinctions between Air Recyclers, Water Recyclers, and Waste Processing Units, instead of just the normal Life Support. They are not meant to add new abilities for the most part, just to provide points of interest for use in roleplaying. It can make for a much more interesting story if you lose the Air Recycling unit on your ship, rather than just one of 5 life supports.
To use the Roleplay Elements in your game, all human players must take the trait. Do not give AI empires this trait, as they will not be able to use it properly! It should be considered cheating to use this trait in a multiplayer game that is not designed specifically for it.