The highlighted folks in the main list are the 3 other players in your squadron. Galactic Starfighter groups people into 4 man squadrons. Secondary fact, if you look at your minimap/map you will see the 3 other members of your squadron highlighted there as well!
Get out there and coordinate!
Is it possible to rearrange squadrons before a match starts? That way if a guild or other pre-made wants to truly work in dedicated teams, they could do so.