The Wind's Solemn Requiem - Percy Jackson

Percy was a wind spirit. Quite a powerful one too. When Ouranos, the primordial of wind was usurped and dethroned by his son Kronos, his essence instead of being dispersed, accumulated into one powerful being. A being of pure primordial essence. A being of wind and air, borne from a primordial's passing.

With the First Titanomachy at full force, with Zeus planning to usurp Kronos, like his father before him. Percy decided to give them his aid, turning the tide of battle to the god's favour. With the battle ended, it changed Percy to the core. Now in Modern Times, the gods call for his aid again. It's up to him whether to help, knowing he'll have to endure the same pain once again, or let an ancient evil overpower the Greek pantheon.