Centurion

Centurions are the servants of Ratatosk, and all eight of them control monsters of their own element.

Throughout the game, most of them are in their core state, interrupted in their awakening when Ratatosk was killed, however, two of the Centurions are seen awake. These are Tenebrae and Aqua.

Pacts with humans
It is possible for a Centurion to make a pact with humans that makes them able to use some of Ratatosk’s powers, but only if they hold the pact. As an example, when Tenebrae made a pact with Emil, this was because he agreed to protect Marta and Ratatosk’s core, making him a Knight of Ratatosk. This may or may not be actually possible, as Tenebrae used this as a cover story to leave Emil ignorant of who he was.

Centurions

 * Tenebrae, Centurion of Darkness
 * Aqua, Centurion of Water
 * Lumen, Centurion of Light
 * Ventus, Centurion of Wind
 * Ignis, Centurion of Fire
 * Glacies, Centurion of Ice
 * Tonitrus, Centurion of Lightning
 * Solum, Centurion of Earth

Name-sake
All of the Centurions names are based off of Latin words:
 * Tenebrae is Latin for shadows or night.
 * Aqua is Latin for water.
 * Lumen is Latin for light or day.
 * Ventus is Latin for wind.
 * Ignis is Latin for fire or firebrand.
 * Glacies is Latin for icy or frozen.
 * Tonitrus is Latin for thunder.
 * Solum is Latin for land, country or soil.