One Piece: Why Sanji Shouldn't Have Taken Up Smoking

gamerant.com:

Sanji is a complex character introduced early in the Baratie arc of One Piece. He eventually goes on to join Luffy and the Straw Hat pirates, though his specific quest is to find the All Blue, a region of the sea where fish from every ocean can be found in one place. His dream comes from early in childhood and even the trauma that he experiences can’t dissuade him. However, one thing that his trauma certainly would have affected is his smoking habit. It is highly unlikely that someone that went through what he did would ever have picked up as addictive of a habit as smoking.

One Piece follows the story of Monkey D Luffy as he gathers a crew and sets out to conquer the Grand Line in an effort to become King of the Pirates. The first few arcs focus on the acquisition of a solid crew, before heading out to the Grand Line. The Baratie arc comes after Luffy has acquired a swordsman, Zoro, a navigator, Nami, and a sharpshooter, Usopp, in this arc he finally finds a cook, Sanji.

Children of the Whales: Is Suou's Goal an Ideal or a Warning?

When Sanji was just a child working as an intern cook his ship was attacked by pirates and sunk in a storm. His life was saved by the captain of the pirate crew at the cost of the captain’s leg. The two of them were marooned on an elevated rocky island with only what little food Zeff was able to salvage from the water prior to their being washed up. Zeff gives Sanji five days' worth of food and recommends that he ration it to last longer. The two nearly starve to death and Sanji discovers that Zeff had given him all of the food and not just a portion.

Once the two of them are finally rescued they stay together and start an ocean-faring restaurant together with the commitment to neverlet another