Fan Theories
The deep folk love a theory almost as much as they love a tide. Six of the best — all speculation, all labeled.

Every theory below is fan speculation — labeled as such, none of it canon, all of it fun.
1. She is the trench, dreaming
The Murmur Trench murmured a name, and she answered — so maybe she is the answer: the trench dreaming itself a daughter so it would have someone to talk to. Evidence: she understands the murmur. Counter-evidence: she denies it, laughing, which proves nothing.
2. There was a first tide-child, and it didn't work
An older, wiser deep-folk tale: the trench tried this once before, and the first tide-child dissolved back into weather. She is the second attempt — the one that held. She goes very still when this comes up, which the theorists consider confirmation.
3. The Siren's Heart is her other half
The shell beats in time with her pulse across any distance. Theory: when the tide-egg hatched, something stayed inside — and the Heart is it. She calls this "a lovely story" in the tone she uses for weather reports.
4. Pip is secretly in charge
The cleaner shrimp times her drills, judges her visitors, and has never been wrong about a person. The theory writes itself. Pip's comment: vigorous claw-clicking, which the choir translates as "no comment."
5. The Drowned Bell is ringing for her
The bell that frays her verses — what if it isn't noise, but a message in a language even older than Slowsong, and she's the only one who could learn it? She has not tried. "Some doors," she says, "are closed for excellent reasons."
6. The Long Drift is a search
She's riding the deep currents listening for a name the trench hasn't finished saying. Theorists say: she's looking for another tide-child. Romantics say: she's looking for whoever the trench was naming. She says she's "just swimming." The deep folk believe her exactly as much as she expects.