Eyja (エイヤ) is a volcanic island situated in the sea north of Remiferia.
In Akatsuki no Kiseki, Eyja's whereabouts are located by a team led by Albert Russell. Historical ruins on the northern site of the island tell Eyja's long history. Inhabitants of Ejya live in underground settlements, such as Eyja Village (エイヤ村). They live a self-sufficient life by making using of geothermal energies.
- Mayor of Eyja
- Roma Eklund
- Eyja may be named after Eyjafjallajökull.
- Akatsuki no Kiseki, Chapter 7: "Remiferian Turbulence", Part 4.