Biko has a broad, softly lined face and a compact frame that seems to take up more room than it should. Her skin has the dry, finely ridged texture of river clay after rain. She walks with a measured hitch on her left side, planting her cane, pausing, then stepping as if keeping time for someone just out of sight. A little carved wooden bird hangs from her belt; its beak has been rubbed nearly smooth by years of her thumb worrying it. People often expect a family matriarch to wear heirlooms proudly, but Biko kept her finest jewelry hidden in a flour tin and preferred a battered child's whistle on a cord.

Biko is tender with the frightened and unsparing with the self-satisfied. In ordinary company she jokes, feeds people, and lets small mistakes pass; when a song is used to excuse cruelty, her humor vanishes and she asks exact, practical questions. She loves beauty but distrusts anything made beautiful to avoid responsibility.

Biko was born among reed-cutters and ferry families on a slow, flood-prone river. As a child she learned the family verses that marked births, bargains, griefs, and safe passages through fog. Her grandmother taught her that a song could preserve a truth when a written record was dangerous, and Biko later passed the first verses to her grandchild Sava Reedvoice. In her youth she performed at ferry landings for meals and news, then settled into a life of mending clothes, tending a kitchen garden, and teaching children to keep time with their feet. A formative flood changed her: she sang a warning verse until a trapped boat crew heard it through the storm and found the high channel, but afterward she discovered that one line had been altered by a relative to conceal who had cut the moorings. Since then she measured every song against its consequences, not its beauty. She died peacefully, leaving Sava a tune, a worn bird whistle, and unresolved questions about the altered verse. Her shade now surfaces only in familiar places, while her living family argues over whether to reveal what the old song accuses.