Conversing with Rich Sanchez, Rook, Marigold, Maven or Special Forces is one of the challenges in Week 2 of Season 7 of Fortnite.
You'll find them at the satellite stations commanded by the IO organization, or at the secret bunker. Talking to them will give you more information about Season 7, and the conflict between IO and the aliens.
Where to find Rich Sanchez, Rook, Marigold, Maven or Special Forces
You'll just need to interact with each of them to complete the quest. Finding them is simple, as nearby NPCs will be marked on your map.
Spotting this sign will prevent you from running around and searching every corner. Be careful not to attack NPCs with bullets or pickaxes. They will become aggressive if attacked, and you will lose the possibility of interacting with them.
Finally, watch out for rival players who will also want to complete this legendary quest. The most effective solution is to land near NPCs furthest from the path of the Battle Bus.