| David |
Attenborough | British broadcaster and biologist |
| Jane |
Eyre | Fictional novel by Charlotte Brontë |
| Hank |
Jones | Senior botanist and Rowan's husband |
| Dominic |
Salt | Grieving, stern patriarch and caretaker of the island. Aka: Dom |
| Fen |
Salt | Middle child; deeply connected to the seals and the sea; longing for escape |
| Orly |
Salt | The youngest; sensitive child fascinated by seeds |
| Raff |
Salt | Fen Salt's brother |
| Alex |
| Worker on the island who shared a bond with Raff Salt |
| Carol |
| Fen Salt's acquaintance |
| Carver |
| Significant figure connected to Dominic Salt's deceased wife |
| Claire |
| Dominic Salt's deceased wife |
| Jay |
| Rowan's sibling |
| Liv |
| Rowan's sibling |
| Naija |
| Alex's sibling |
| River |
| Rowan's younger brother |
| Rowan |
| Shipwrecked protagonist carrying secrets and searching for answers about her husband |
| Tom |
| Alex's older brother |
| William |
| Figure from the past connected to the Salt family's tragedy |
| Yen |
| Captain of the boat |
