The Espeoran Alliance is an alliance started by 1785 Khaalida, ruler of Espeor. It includes several lands, where a representative from her land stays and they have a commitment to peace, trade, and negotiation.
The official lands of The Alliance are Espeor, Phaedra, Snowhaven, Artemesium, Labyrinthian, and Torre.
Espeor was the start, and Snowhaven was next to join. Phaedra and Torre followed shortly after, with Artemesium not far behind. Labyrinthian was the last to join, and while the Baroness wouldn't have made the choice easily herself, she did it for her daughters.
Trade is plentiful between them, and there are portals between the lands for easy travel and communication, though not everyone likes to travel by fae circle.
While Arquilonwe and Valisthea have no official ties to the Alliance, they are still close with the Alliance. Sidra kept Valisthea out of the alliance officially, but given that her mother is the creator of the Alliance she has close ties with them. Arquilonwe is close by the principle of being a neighboring land to many, though they have no official ties. Nav and Periapt are lands without official members or governance, and therefore not with the Alliance.
Rinth, Spire and Echaria are the Unknown Lands. In the main narrative of the Alliance, they are not known to the others except in passing. Rinth, home of Piroska, has slight ties to Espeor, Valisthea, and Nav, but only by the fact that Piroska is known to them and she trades in Espeor for some of her pilfered goods.
Spire and Echaria exist so far completely outside of the narrative of The Alliance. While they may become known to the Alliance or each other, neither will ever form formal ties to the Alliance.
Frey's BF owns Der Eisendrache, lol, she has no control over that.