Gaimon did not join the Straw Hats because he chose to dedicate his life to protecting the rare animals on his island, which he regarded as his most precious treasure.
An Offer Declined for a Greater Purpose
During their encounter, Monkey D. Luffy extended an offer to Gaimon to join his pirate crew. This proposition came after Luffy and his companions helped Gaimon realize that the treasure chest he had guarded for two decades was empty. Despite the initial heartbreak this revelation caused, Gaimon did not succumb to despair. Instead, his focus shifted entirely.
His primary reason for refusing the Straw Hats' invitation stemmed from a profound commitment to the unique wildlife inhabiting his island. Over his long solitude, Gaimon had developed a deep bond with these creatures, growing to view them as his true and invaluable treasure. He resolved to spend the remainder of his days safeguarding them, ensuring their well-being and preservation. This personal mission superseded any desire for adventure on the high seas with a pirate crew.
Gaimon's Decision Summary
Gaimon's choice to remain on the island can be summarized by contrasting his past pursuit with his newfound purpose:
| Aspect | Before Meeting Straw Hats | After Meeting Straw Hats & Luffy's Offer |
|---|---|---|
| Primary Focus | Guarding a "treasure chest" | Protecting rare island animals |
| Source of Value | Material wealth (empty chest) | Living creatures (his true treasure) |
| Emotional State | Long-term waiting/disappointment | Resolved, purposeful, content |
| Straw Hat Invitation | N/A | Declined |
| Future Resolution | Continue guarding | Spend days protecting animals on the island |
His decision highlights a core theme of finding value in unexpected places and dedicating oneself to what truly matters.
