One Piece Chapter 22, page 20: YOU ARE A RARE AND PRECIOUS ANIMAL TOO

Gaimon explains that he has spent the last twenty years protecting the treasure on the hill, even though he cannot reach it himself. Luffy agrees that the treasure belongs to Gaimon. Nami generously offers to help Gaimon retrieve the chests from the hill. Gaimon is deeply touched by their kindness, while Nami angrily tells Luffy to shut up when he questions her sudden helpfulness.