Faction
From The Dim Future Wiki
Factions define the game world allegiances and skills known by a given group of people. A player cannot play an Action, Tool, or Installation that does not share a faction with their leader. To play a Character that does not share a faction with a player's leader they must pay 2 extra energy of the character's primary energy type. This energy is not needed to restore the character. In addition, if the player ever fails to pay the character's restore cost it is immediately and permanently removed from the game.
Any card with no printed faction is considered to have allegiance to any faction.