Since I haven't read this specific fanfiction, a possible plot could be that Percy and Athena are brought together by some ancient prophecy related to the 'timeless warrior'. They start off not really trusting each other due to their different backgrounds. Percy, with his demigod powers, and Athena, with her godly wisdom and powers. As they embark on their journey, they encounter various mythical creatures and obstacles. Along the way, they learn to understand and rely on each other more, and ultimately, they fulfill the prophecy and perhaps bring about a new era of peace or something similar.
I'm not sure of the exact plot, but it could be that there is a threat to the fabric of time itself. Percy and Athena are chosen as the 'timeless warriors' to combat this threat. The fanfiction might show how they use their combined skills and knowledge. Percy's experience in dealing with on - ground challenges and Athena's strategic thinking. They might travel through different time periods, gathering allies or artifacts that are necessary to stop the evil force that is messing with time. And in the end, they succeed in restoring the balance of time, and their relationship has also evolved into a strong bond.
Chapter 411, "You Really Hold a Strong Grudge", is the clearest early answer because it turns Yu Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from The lead director, who understood the entire process, had an...
Chapter 527, "Shaojing Bro, I'm Sorry", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li, taking advantage of these people's inattention, had already...
Chapter 482, "Someone Might Need Me", is the clearest early answer because it turns General Dino's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Other people caught a glimpse of Zhao Lang's cold and stern face and...
Chapter 178, "The Group's Favorite Belongs to No One but Her!", is the clearest early answer because it turns Wanwan's situation into a concrete plot event. The chapter turns that into something concrete by moving from Wen Jiaojiao is just too unreasonable, why does she have to single...
Chapter 374, "From Now On, Jiang Li Calls the Shots in Golden Sand!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Li's bold behavior infuriated Jin Siyue, but it also succeeded...
Chapter 372, "Finish the Wine and I’ll Let You Leave", is the clearest early answer because it turns Jin Si Yue's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jin Si Yue suddenly realized that his wrist was back in proper...
Chapter 183, "Sacrifice Oneself, Break Them Up!", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. The chapter turns that into something concrete by moving from Seeing that he held a blue ball identical to Su Yinwan's, Jiang Yan...
Chapter 447, "Going Viral on the Internet", is the clearest early answer because it turns Going Viral's situation into a concrete plot event. The chapter turns that into something concrete by moving from Old Sir Jiang: "...." His face had grown even worse.
Chapter 336, "He's Just a Charlatan!", is the clearest early answer because it turns Charlatan's situation into a concrete plot event. It opens with Lady He kept mocking with relentless sarcasm. and closes on He even says I bring him luck." "My son is also very competitive,....
Chapter 213, "Shi Xu, You Must Understand How to Balance Meat and Vegetables", is the clearest early answer because it turns Shixu's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Cheng also noticed where Jiang Shixu's attention lay.