There have been three groups, in recent times. The were previous groups but Lothlorien was attacked , erasing memory of those groups.
3 people 60 years ago (1903)
Paladin - Tranon Stellarson
Charismatic Hero - Melissa Van Dyke
Wizard - Dak Melarson
3 people 40 years ago (1923)
Thug - Bill Hannah - The henchman with no hope. (1936)
Smart/Charismatic Hero - Susan O'Halloran - The graceful, contemplative media technician. (1987)
Tough Hero - Charlie Doon - The inhibited prospector. (1876)
4 people 20 years ago (1943)
Jedi Guardian - Samak Nebulon - The hysterical, charismatic mentor.
Fast/Smart Hero - Sarah LeDieu - The dexterous, artistic pharmacist.
Infiltrator - Six - The tireless, serious, altruistic super-powered agent.
Monster trainer - Syku Kolajahu - The sloppy monster rancher.
That makes Gavin and Lydia Group 4