The Trinity Elixir (三元水, Sangensui) is the mother solution for all sorts of liquids, located in the South-southeast of the known world in the Dark Continent. When the Republic of Minbo, after enlisting the help of the Hunters Association, sent an expedition to the Dark Continent in its search, they were surrounded by Ai. After a still unknown dispute or struggle ensued only three survivors returned, but empty-handed and without even a shred of their sanity.