Reunoiden

Reunoiden is a term used in speculative fiction and tabletop role-playing contexts to describe a group or species associated with borders, liminal spaces, and transitions between realms. The concept centers on beings that inhabit or guard places where different biomes, cultures, or political boundaries meet, and which often function as mediators or custodians of crossing between domains.

Biology and form in depictions of reunoiden are highly varied, reflecting their connection to edges rather than a single lineage. Some portrayals present energy- or spirit-based entities, while others imagine corporeal beings with highly adaptable physiology, camouflage abilities, or features that shift with changing surroundings. The common thread is an emphasis on perception and presence at boundaries rather than on uniform anatomy.

Habitat and ecology typically place reunoiden in ecotones and border zones: coastlines and shorelines, mountain passes, frontier towns, or transitional landscapes where ecosystems or societies blend. Their interactions with humans and other species range from neutral mediators to wary guardians, and in some stories they serve as custodians of sacred or unstable borders.

Culture and society are depicted with a focus on balance, mediation, and restraint. Reunoiden communities, when shown, often prioritize harmony between adjacent groups, regulate crossing protocols, and maintain knowledge about shifts in boundaries, whether physical, cultural, or temporal.

In fiction and games, reunoiden serve as catalysts for exploring themes of liminality, migration, and coexistence. Because there is no single canonical portrayal, writers reinterpret their origins, abilities, and loyalties to fit different worlds and narratives. See also: liminality, borderlands, ecotone.