Francis Scott Key Fitzgerald stands 191 cm tall with a slender build weighing 88 kg, possessing short blonde hair and clear blue eyes. He favors tailored suits, first appearing in creamy yellow with a pink shirt and tie, later adopting a brown suit over a black polo shirt following the Guild's dissolution. Distinctive green tattoo-like stripes manifest across his body and clothing when activating his ability. His personality radiates extreme confidence and arrogance, frequently boasting of his immense wealth. He displays intense determination to achieve his goals, becoming furious when his offers are rejected. Despite this possessiveness, he demonstrates genuine concern for subordinates, viewing them as possessions he has the "right to protect" to ensure their safety. His primary motivations stem from devotion to his family—his wife Zelda and deceased daughter—driving many actions. Fitzgerald's ability, *The Great Fitzgerald*, boosts his physical strength, speed, agility, and durability proportionally to the monetary value he spends or symbolically discards, such as writing checks or relinquishing valuables like his wedding ring. Moderate expenditures grant short-term enhancements, while massive spending enables combat power rivaling top-tier ability users. The ability’s name references F. Scott Fitzgerald’s novel *The Great Gatsby*, echoing its protagonist’s wealth-driven pursuits. Born into poverty, Fitzgerald labored for two years to buy a gun, then killed four people to seize money. He ultimately amassed vast wealth through conglomerates, hotels, airlines, and railways. He married Zelda and had a daughter, but their daughter's death triggered Zelda's severe psychological decline; she believes their daughter studies abroad. This tragedy fueled Fitzgerald's quest for the reality-altering "Book" to resurrect his daughter and restore his family. As Guild leader, he launched the Yokohama Burnout Operation, deploying the airship Moby Dick to destroy the city and secure the Book. He placed a bounty on Atsushi Nakajima due to the boy's Book connection. During the Guild arc, he expended his entire fortune battling Atsushi and Akutagawa, leading to defeat and a fall into the sea. He survived solely because his wedding ring’s value activated his ability, leaving him destitute. Found later as a beggar in Yokohama’s slums, he regained purpose defending Louisa May Alcott from an attack. Rebuilding his organization as the Renewed Guild, he acquired security firm Manasset Security via stock manipulation, aiming to amass $50 billion to buy the Ministry of Internal Affairs. In the Hunting Dogs arc, he allied with the Armed Detective Agency under Osamu Dazai’s offer to track Fyodor Dostoevsky in exchange for the Guild’s treasure. He later aided the Agency during the "V Order of Five Sacrifices" incident, offering the "Divine Eye" to locate Mushitarō Oguri if Margaret Mitchell’s life was saved. Key relationships include his devotion to Zelda, protective ownership of subordinates like Louisa May Alcott, and transactional alliances with figures like Dazai. His quotes encapsulate his worldview: "I own you, and I have the right to protect you"; "Is there anything in this world worth sacrificing for besides your own family?"; and "I’m on the side of the strong... the Detective Agency will win."