There are hidden characters/items in the game.
Turbo Boots - Check the bush in Far East Village.
Lacy - Check the secret wall you have to move, she sits on the ground.
Azalea - Check the tree next to the church in Far East village.
Light of Hope - Look in the castle dungeon, check the wall of the cell to the left coming from the castle attic.
Pixie - Look in the puddle to the right in the beginning of the Far East Shrine