Setting

The setting of the story will be around 2600 B.C., as Gilgamesh's twin brother, but instead of being 2/3 god and 1/3 human-like Gilgamesh, will be 1/3 god and 2/3 human. After some time will go on to another hero's journey to see what accurately happens. Then after that, he will be brought into the 4th holy grail but more as a observe like the ruler class.

He'll then stay with his wife ( maybe wife's I don't know yet) and adopted daughters. Entail the 5th holy grail war. Were he'll leave to fate/Apocrypha then too fate/grand order, and maybe fate/extra.