And of course, the supplement also contains player options: backgrounds, new pilot gear, talent trees, exotic systems, and a set of rules for playing an NHP as a player character.
In addition, Legionnaire has a large number of tools for GMs hoping to incorporate NHPs into their games, including generators, sample NPCs, hooks for missions, flashpoints for campaigns, new burdens and a new NPC template, as well as advice on mission design, handling cascade, and roleplaying as these entities.
Legionnaire contains a deep dive into the lore behind NHPs.