The Edo were a free-spirited people, extremely welcoming and friendly and very open sexually with themselves and visitors. Edo greeted friends with a deep embrace and offered themselves sexually to anyone who would accept. It was customary among the Edo to run from place to place instead of walking. Their society was peaceful and extremely law-abiding. Criminality had been wiped-out thousands of years ago and was virtually unknown by 2364.
The unique tranquility of the Edo had a price, however. Criminal punishment was only enforced in random punishment zones that only the planet's Mediators knew, but anyone who committed any crime in the punishment zone faced a quick execution with a poisoned syringe.
Later in 2364, during an investigation of the USS Enterprise-D crew, Lieutenant Commander Dexter Remmick interrogated Captain Jean-Luc Picard about him having violated the Prime Directive and interfered with Edo laws to save Wesley Crusher, son of Doctor Beverly Crusher. (TNG: "Coming of Age")
In 2380, Ensign Beckett Mariner suspected Lieutenant Barbara Brinson of potentially being a member of the Edo when she became Brad Boimler's girlfriend, describing them as "one of those sexy people in rompers that murders you just for going on the grass!" (LD: "Cupid's Errant Arrow")