The two usergroups that general members will need to be properly versed on are both Keepers and Rangers.
All users can join the Keepers group as it is open to all owners of a Lepus Draconis Adoptable. If you do apply to join this group you are letting everyone know that you have or will have a Keeper character as an NPC or Roleplay Persona. You can also join the group if you only plan on roleplaying your Ti'rhyn but keep in mind that they will have a Keeper they are bonded to and make reference to; they just don't ever have to show up in the roleplay scenes if you prefer they not.
Rangers is a closed group and invite only because it represents those Keepers and others who have shown an innate ability to work with the Ti'rhyn in their natural environment. That is it's In Character representation, Out Of Character the Rangers are Lepus Draconis Staff of some sort or another who either help me with the adoptable it's self or with the running of this forum/the website. Either way, Rangers are trusted and experienced people In Character and Out.