He had no name.
Adopted by his own children, Gaia and Alaya, he began living a different life.
His name was Zero.
A man named Merlin gave him that name.
Before he knew it, he had become King Arthur's teacher, and the most important person in her life.
After she died, he began traveling.
He journeyed through different worlds,
forged bonds with the spirits, and built a family.
He also came to understand responsibility.
He saw the future,
and gained a surname of his own: Yakumo.
Thus began a new journey.
In the end, he would leave for certain reasons
and fall asleep in his final resting place.
You ask where that final resting place is?
"Of course, in that beautiful Gensokyo."