From StrategyWiki, the free strategy guide and walkthrough wiki

• Link (or the player's chosen name): The hero of the story, Link washes up on an island after attempting to save his friend Tetra from the Ghost Ship.
• Tetra: Link's friend (actually Princess Zelda). She disappeared while investigating the mysterious Ghost Ship.
• Cielia: A fairy that finds Link after he washes up on the island where she lives with her "Grandpa"
• Grandpa: An old man with a mysterious past who found Cielia when she was young and raised her.
• Linebeck: A sailor who cares only cares for finding treasure, though he does have a compassionate side, as well. He and Cielia do not get along well.