Monkey D Luffilia was walking around the beach by Foosha Village where she saw a strange fruit that looked like a star laying under a coconut tree. After eating said fruit she meet a pirate name Shanks and his crew at her caretaker's bar, where he explained everything that happened to her and made her wanting to become a pirate like him. Luffilia is 16 when she started. Updated version on Ao3 under the same name username