- "But, like all living organisms, the Earth released a fever to fight this infection. Its original, rightful rulers: the Titans. For thousands of years, these creatures have remained in hiding around the world. And unless all the Titans are found, our planet will perish and so will we. They are the only guarantee that life will carry on."
- ―Emma Russell
The Titans were a group of ancient megafauna. According to Dr. Emma Russel, these titanic creatures were Earth's rightful rulers. Despite being collectively designated as "Titans," each creature appeared to be from a different ancient species. The known Titans include Godzilla, Mothra, Rodan, and Ghidorah.
Cave paintings drawn by ancient humans suggest that, despite several of these creatures having predated humanity, the Titans were active following the advent of humanity and were known to fight each other for unknown reasons. For instance, at some unknown point, Godzilla (or a member of his species) fought Ghidorah.
With the advent of the Nuclear Age, the Titans became active again in the form of Godzilla, who began attacking nuclear submarines in the Pacific Ocean. In the 1950s, the United States of America attempted to kill Godzilla, under the guise of nuclear tests, but they were ultimately unsuccessful.