The Twin Blades of the Empire

The Twin Blades of the Empire are powerful Dragons in Shining Resonance Re:frain.

Official Summary
Among the Dracomachina that the Empire awakened, the two left in charge of defending the country are called the "Twin Blades of the Empire." They obey Princess Excella's command, and wield their legendary power in her name. They are said to symbolize the rule of her father, the Emperor.

The Twin Blades

 * The Aquatic Sword: Caliburn
 * The Demonic Blade: Dainsleif