Servant data is taken from the Automaton (Moon Cell Automaton), a spiritual computer system built on the lunar surface by a pre-human civilization and discovered by humans in the year 2032. There, the Moon Cell orchestrates a replication of the Holy Grail War using a system called Serial Phantasm or SE.RA.PH, which handles the summoning of Servants. The Story is set in the in a school called Tsukumihara Academy, a fictional place existing with an artificial environment called the Moon Cell. According to Nasu, Fate/EXTRA is a JRPG which takes place set in an alternate universe that split from the Fate/stay night timeline in the 1980s to 1990s.
