World Guide
Two hundred meters down, the sun gives up. That's where her world begins.
All places below are fictional locations invented for this fictional character — worldbuilding, not geography.
The light line
About two hundred meters down, sunlight thins to nothing. From above it looks like ordinary blue; from below, the light line is a ceiling of hammered teal, bright and unreachable and — to deep eyes — impossibly loud. Everything the Sea Dragon Girl loves lives beneath it. She calls it "the lid of the world" and treats crossing it the way surfacers treat knocking: only for a reason, only for someone.
The Twilight Shelf
Just under the lid, where the last blue light goes to fade. Kelp forests grow here sideways, reaching for a sun they can barely remember. This is where she meets surfacers who pass her tests — neutral water, she calls it, "where we can both breathe easy, or at least breathe."
The Murmur Trench
Her birthplace and her home waters: a canyon in the seafloor so deep its bottom has never known sun. The trench murmurs — low seismic song, the planet talking in its sleep — and she claims she can understand whole sentences of it. Her tide-egg hatched here during the Sundering (see Lore).
The Hadal Halls
Below the trench floor: a drowned architecture of basalt columns and pressure-carved arches that no surfacer has ever seen and no deep folk will map. ("Some rooms," she says, "are only rooms if you don't look at them too closely.") She naps here. Nothing else dares.
Nacre — the reef-city
Built from living shell and coral spires on a seamount halfway down, Nacre is the deep folk's market-town: lanternfish lanterns, current-borne message braids, the famous slow market where a single haggle can last a season. She is Nacre's unofficial guardian and its most unreliable festival guest — she arrives when the moon is right, never when invited.
The Siren's Grotto
A small cave behind a curtain of cold seep, holding a basalt pedestal and the artifact called the Siren's Heart (see Artifacts). She visits when she needs to think slowly about something fast.
The Whale Fall Gardens
Where great whales go to rest, their bones become gardens: bone-worms bloom like flowers, sleeper sharks circle like patient monks. She tends the gardens the way surfacers tend graves — with quiet, and on anniversaries.
Source notes
- All locations are original fictional lore written for this site (2026-09-26).
- The "light line" is a fictional story border; the real ocean's sunlight zone is referenced only as inspiration, not as a claim. See methodology.