Eria

Eria is a part of the Nation of the Sea who 300 years ago were banished to the baren tundras of Banyu by the three other Nations that make up the Pasekuthon.
Times have changed since the exile of her people and new human rights groups want to reunify the nations. The only problem is nobody has seen any members of Nation of the Sea in decades as the Banyu is extremely difficult to cross into, with deadly cliffs and subzero temperatures.
But one group takes action and sets out to find life in these lands and they just happen to come across Eria, the perfect candidate to join their team.