Although the island is currently uninhabited, there are still ruins of an old settlement. The ancient Bryonians lived in stone-made cottages reminiscent of igloos. They lived here until the Middle Ages, after which they abandoned the island.
The Bryonians were traditionally animists, who offered prayers at an altar. In S.1206, when Rean Schwarzer and Class VII light the animist statues spread throughout the island, the altar reveals itself as the Sol Shrine (陽霊窟).
- In chapter 3 of Trails of Cold Steel, Bryonia Island served as the location for Group B's field study.