Finny The Fish And The Seven Waters
Completion bonus
Successfully complete the game, then save the game when prompted after the credits. Load the cleared game file to continue playing the game from Floating Island. You can return to any level and be able to complete the Prey Eaten and Fishing Lure Stolen lists.
Gold Finny
Get all 106 entries on the Prey Eaten list and all 100 entries on the Fishing Lure Stolen list to unlock Gold Finny.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original