Disclaimer: I doesn't own Percy Jackson or Fate/Stay Night.
Chapter 1- Fate/Interwined
Heroic Spirits
The spirit of those who had achieved great deeds in life, whose deeds was recorded in the course of human history. These individuals are those who had leave their marks so great, that they were forever being engraved to humans' memory even if their existence had always been debated.
He had never thought that he would be in the Thrones of Heroes. Not that he didn't think himself as a hero; after all, he was born to become one. No, the real reason for his confusion is that how does the Thrones knew about him, when they were two worlds apart. He came from a world where the Age of Gods had never settled. Well... never settled properly. The gods, more particularly the Greek Gods had all distanced themselves from the human, contend with only watching them from their thrones in Mount Olympus. But other heroes at the Throne had always been from a world where the Age of Man have come. Their deeds were mostly a result of self-quest, not ones that were given by the gods. Even the individuals that came from the Greek era have different story and history than the ones that he learned when he was alive.
He still remembered how shocked he was when he first saw Chiron here. He acknowledged that the one that he knew and the one that existed in Throne of Heroes are not same, but every time he saw the child of Cronus, he was reminded of his wise camp counsellor. The same could be said about the other Greek heroes; their name and the memory from their names made it hard for him to forget about his old world.
The only one that he could recognized is his teacher. Well, a version of his teacher. A version that had been screwed over by the collective will of humanity and developed a spiteful outlook on the world and the concept of peace. This person is not the same man who once had taught him about peace and justice. The man who had lead him into numerous adventures,or misfortune adventures, that were the result of his own lack of luck.
He could felt the Thrones' call for him for the next Holy Grail War. He knew that this is his chance to pay back his teacher's deeds. As he felt a portion of himself being transferred out to the world, he just smiled and said,
"I'm coming for you, sensei. Get ready for our next adventures."