Dr . Sid Dr . Sid is one of the main characters in " " . He continues the " Final Fantasy " series tradition of having a character named Cid appear in most " Final Fantasy " games , despite the Doctor ' s named spelled with an nontraditional " S " . Dr . Sid ' s voice was provided by . Profile . The polar opposite of Douglas Hein in a lot of ways , Dr . Sid is an even tempered man of science whose steadfast respect to life and resulting passive opinion of the Phantom invasion is a source of frustration for those , like Hein , who are of a more aggressive outlook . His relationship with his protege , Aki Ross , is that akin to father and daughter . Story . He is a scientist who has discovered spiritual energy within all living things . Born in Toronto in 1995 , Dr . Sid is a biochemistry graduate of the University of Scientific Research . He spent long hours researching the physical properties of living things . After discovering a strange energy during a gravitational field extraction experiment , Dr . Sid began his research upon spirit energy . He along with his wife created the " Gaia Theory " , a theory where each life is born of Gaia and each life returns to Gaia upon death . Each life holds a spirit and each spirit brings its experience back to Gaia , enabling it to live and grow . This theory , however , was not widely accepted by fellow scientists , and Dr . Sid and his wife kept it to themselves . In 2031 , when a meteorite from the annual Leonid Meteor shower fell on the Middle East , a series of strange sudden deaths to all living things occurred in the region where the meteorite fell and began to spread across the world . Eight years later , Dr . Sid and his colleagues uncovered evidence of Phantoms who are responsible for the attack . Dr . Sid lost his wife in a Phantom attack over Toronto , and since then dedicated his life to solve the Phantom problem . He discovered bio - etheric energy , as well as a unique wave pattern within the Phantoms . With this discovery , he advocated the use of bio - etheric energy and invented spiritual scanners , ovo - pacs , as well as the weapons used to fight the Phantoms . His greatest invention , however , was the Barrier Cities which provided protection against Phantoms . With this achievement , he became the director of the Bio - Etheric Center in New York Barrier City , and dedicated himself to research on the wave theory . He has been working on gaining eight spirits of life to make an " anti - wave " against Phantoms , which could save the people and the planet itself . With Aki Ross as his protege , Dr . Sid continued to search for the remaining spirits to complete the wave pattern against the Phantoms . Other appearances . Thriller Easter Egg . Sid makes an appearance ( along with the rest of the film ' s virtual cast ) in a hidden parody of Michael Jackson ' s " " music video created for the DVD release of the film . The parody is set shortly after Douglas Hein inadvertently causes the destruction of the New York Barrier City ' s barrier control room . As he runs away he runs into Aki , Gray , Ryan , Jane , Neil , Dr . Sid , Major Elliot and three alive Phantoms who proceed to , as a group , perform the dance number to " Thriller " with Aki as the lead . Etymology . Cid is a recurring name in the " Final Fantasy " series .