Eiren has the compact, buoyant build of someone used to working in shifting water. Fine, overlapping scales catch light across their shoulders and temples like wet shell, while the skin of their palms is ridged for grip. They move with a rolling, tide-timed economy on land, as if each step tests the ground before trusting it. Their hair is meticulously combed into narrow, glossy ropes, each one secured with a tiny shell bead. A surprising detail for a stern mediator: a bright orange glass bead is tied at the end of one braid, a toy prize from a child they once helped.

Eiren would rather face an angry person directly than let resentment grow in their absence, yet they are slow to trust a compromise that sounds too convenient. In calm company they are wry, patient, and unexpectedly playful; when frightened, they become rigidly procedural and insist on hearing every side, even when immediate action matters more.

Eiren grew up among the reef channels of the Foamward shallows, where disputes over fishing grounds could become dangerous before anyone admitted they had begun. As a child, they learned a wordless song from an elderly diver who used it to keep frightened children calm during storms. The diver died before Eiren learned their name, and Eiren has preserved the melody ever since. Years later, after a failed negotiation over a damaged reef left two families refusing to speak, Eiren swam between their boats during a squall and made both crews listen to each other before the tide turned. That encounter made them a trusted face-to-face mediator. Now Eiren is bound by an old promise to keep a disused sea gate shut, though the settlement it once protected has been abandoned. The gate is failing, and reopening it could restore a nursery reef while flooding the graves of the people who made Eiren swear to keep it closed.