Gaia Key (Archie)

The Gaia Keys are objects appear in the Sonic the Hedgehog and its spin-offs published by Archie Comics. They are a set of ancient keys needed to access the inner chambers of the various Gaia Temples from the Gaia Gate in Apotos. Each key consists of two halves: a Sun Key and a Moon Key.

Known history
For an unknown amount of time, the Gaia Keys have been safeguarded by a group of protectors who kept their task a closely guarded secret. However, their identities were made known to Gregorios, keeper of the Gaia Gate, who likewise safeguarded this information.

Shattered World Crisis
During the Shattered World Crisis, Gregorios came chose to break silence and warn his colleagues after Metal Sonic attacked him looking for information on the temples. He also shared a list of those involved with the New Freedom Fighters to enable them to gather the keys and thus access the temples and restore the world.