Wang Yao, an ordinary civil servant who wrote materials within the system until he vomited, woke up and traveled to the world of "One Piece" and became a civilian officer at the Navy Headquarters.
While other people who traveled through time either had their domineering awakening or their fruits were heaven-defying, it was better for him - his daily job was to file files for all Devil Fruit power users and write the damn "Devil Fruit Power Development and Application Annual Report"!
So, when Luffy was rampaging in the East China Sea, Wang Yao stayed up late to write "Analysis of Actual Combat Data of Rubber Fruit Ability Users in Low-End War Zones"; when Crocodile was defeated, he had just handed in a "Long-term Tracking Report on the Impact of Swish Fruit Abilities on Alabasta's Climate"; while the war was shattering, he hid in the basement and coded frantically, with the title "Prediction and Analysis of Changes in the Power Structure of the New World after the Destruction of the Whitebeard Pirates".
The war ended, the Warring States Period retired, and the navy was in chaos. The new marshal Akainu was worried about the mess in the new world. A copy of the "Strategic Layout of the New World and the Plan for the Clearance of Pirate Forces" with a total of 100,000 words was slapped on his desk.
After Akainu finished reading, he was silent for a long time, then slammed the table: "Who is this Wang Yao? Let him be my chief of staff immediately!"