I got ChatGPT to come up with something to explain Sanjis flames, his natural talent for cooking in general, how Sora met Judge and why she married him and her backstory too:
INT. GERMA KINGDOM - LABORATORY - FLASHBACK
The Germa Kingdom's secret laboratory was a place of cold, sterile steel, and imposing machines. Among the scientists working diligently was a young woman with striking blonde hair named Sora. She possessed a natural brilliance and a kind heart that set her apart from the others. Sora had always been drawn to science, seeking to use her knowledge for the betterment of people's lives.
FLASHBACK - YEARS EARLIER
Sora was not originally from Germa Kingdom. She hailed from a distant land, where she had grown up hearing tales of Lunarians, the enigmatic race with black wings and the ability to manipulate fire. Her parents had told her stories of their ancestral connection to the Lunarians, stories of a once-great civilization that had mysteriously disappeared. These tales had ignited a deep curiosity within her.
One fateful day, while conducting research on a remote island, Sora's expedition team discovered an ancient artifact tied to the Lunarians. Among the relics was a stone tablet containing secrets of the Lunarian flame, said to possess the power of transformation. This discovery was groundbreaking and dangerous.
FLASHBACK - LABORATORY
Sora brought her findings to the attention of her superior, Judge Vinsmoke, the head of the laboratory. Judge was known for his stern demeanor and ruthless pursuit of power for the Germa Kingdom. Sora was initially cautious, but as she explained her findings, Judge's eyes gleamed with intrigue rather than malice.
Judge: (impressed) Sora, your work is exceptional. These secrets could change the course of history.
As Sora and Judge collaborated on the research, a connection grew between them. Despite his reputation, Sora discovered that Judge was more than just a power-hungry leader. He had a vision for using their discoveries to improve the lives of the Germa people.
Their partnership deepened, and they began to develop a sense of mutual respect and affection. Sora admired Judge's determination and vision, while he was captivated by her selflessness and passion for helping others.
Over time, their relationship blossomed into love, and Sora made the difficult decision to marry Judge, despite the stark differences in their personalities. She believed that together, they could use their discoveries to bring about positive change.
FLASHBACK - GERMA KINGDOM
Sora's marriage to Judge Vinsmoke eventually led to the birth of their children, including Sanji. Sora instilled in her children the importance of kindness and compassion, even in the face of their family's ruthless reputation.
Unbeknownst to Sanji, Sora had passed down her knowledge of the Lunarian flame to him through a hidden recipe book, which explained the unique cooking techniques that harnessed the power of fire. This connection to the Lunarians was what gave Sanji his remarkable culinary skills and his ability to ignite flames with his kicks.
Years later, when Sanji met Dr. Vegapunk, a former member of the rogue scientist team MADS, he learned the full truth about his mother, Sora. Vegapunk revealed that Sora's research had been instrumental in unlocking the secrets of the Lunarian flame. It was this connection to Lunarians that allowed Sanji to manifest fire with his powerful kicks and cook with unmatched skill.
Sanji was both amazed and humbled by the legacy of his mother, Sora, and the incredible knowledge she had passed down to him. It was a bittersweet revelation, connecting him to a heritage he had never fully understood.
As Sanji continued his journey as a Straw Hat Pirate, he carried with him the legacy of Sora Vinsmoke, the kind-hearted scientist who had fallen in love with Judge and had left a profound mark on his life and abilities, all while being related to a legendary race of fire-wielding Lunarians, much like King, the fallen angel with indestructible skin.
(It was meant to explain why she was called Sora in relation to the history of the Marine Hero who fought Germa but it didn't do that part sadly.)