Whole Cake Island Charlotte Family (Big Mom Pirates) ka main base hai. Ye New World ke Totto Land archipelago ka capital hai. Poora island dessert aur sweets se bana hua hai — chocolate rivers, cake buildings, candy trees. Yahan ki queen Charlotte Linlin (Big Mom) hai jo Yonko mein se ek hai aur Soru Soru no Mi (Soul-Soul Fruit) ki power rakhti hai. Big Mom ki dream hai ke ek aisi duniya banaye jahan sab species aapas mein mil jul kar rahein — lekin uska tareeqa dictatorship wala hai. Whole Cake Island arc mein Straw Hats ki team (Luffy, Nami, Chopper, Brook) Sanji ko rescue karne jati hai jise Big Mom ki beti Pudding se shaadi ke liye rakha gaya tha. Yahan Luffy ne Charlotte Katakuri se ladai ki — jo ab tak ki sab se tough fights mein se ek thi. Katakuri ke paas Mochi Mochi no Mi hai aur usne advanced Observation Haki (Future Sight) develop ki hui thi. Luffy ne Katakuri se seekha ke woh bhi future sight karna sikhe. Ye arc mein Brook ne Road Poneglyph ki copy hasil ki aur Jinbe officially Straw Hats mein shaamil ho gaya. Sab se shocking moment: Big Mom ke flashback mein pata chalta hai ke usne apni poori orphan family (Mother Carmel aur doosre bachche) ko bachpan mein kha liya tha.