I don't think the Au Ra will explode to Miqo'te proportions, though there will likely be an initial surge.
These don't have to be explained ICly. They're going to be players that are going to want some OOC time to settle their characters in and figure out their angle anyways. Those that do RP them, well, an Adventurer Guild is going to attract a lot of people.
As far as the Raen, as I said before, we have no idea what 'rare' means for their race.
There is a lot of high tension for something that, inside a year, will become little more than a footnote in RP.
These don't have to be explained ICly. They're going to be players that are going to want some OOC time to settle their characters in and figure out their angle anyways. Those that do RP them, well, an Adventurer Guild is going to attract a lot of people.
As far as the Raen, as I said before, we have no idea what 'rare' means for their race.
There is a lot of high tension for something that, inside a year, will become little more than a footnote in RP.