Biviane (1215 AE-1219 AE) was the younger sister of Cobiah Marriner. Her mother was an alcoholic who became abusive after Biviane's father's disappearance at sea, leaving Cobiah responsible for her welfare. She carried her favourite doll, Polla, everywhere.
In 1219 AE, Cobiah left her with Romy while he went to go and talk to their mother, after telling her a story about a mermaid he saw aboard the Indomitable and giving her a silver for some breakfast. Romy took his eyes off her for a moment and she was off, saying that she wanted to see a mermaid. She climbed one of the dock pylons, slipped, and fell to a quick death beneath the pier.