Caligula is a Freeze-elemental Large Aragami, with a strong resemblance to the Hannibal species. Its large Arm Blades give it a surprising reach, which, coupled with the monster's innate speed, makes ite a dangerous foe.
The following information is taken from the official in-game descriptions of the Aragami found in the NORN Terminal's database.
God Eater Burst
A DLC Aragami who rules over ice, known as the frozen emperor. -
A type of Hannibal Deusphage with blades for arms and a booster on its back. Using them, it launches lightning fast, far-reaching slashing attacks. These attacks are deadly and, unless they can be anticipated, make the Caligula a difficult opponent.
By breaking both its blades and its booster's bonds, its offensive capabilities drop significantly. If possible, take these parts out first.
ATK Element: Freeze Weaknesses: Blaze, Spark
Caligula is the name of the ancient Roman emperor infamous for his cruelty and depravity.
Breaking its arms decreases the range of its blade attacks. This is true for all Caligula subspecies. Note that, unlike most Aragami, unbounding each arm is a separate operation.
Unbounding its booster decreases the range of its ice field.
Unbounding its head causes it to activate an attack where it launches up in the air and charge at its target.
In a cutscene in God Eater 2 Rage Burst, Julius Visconti is shown fighting a colorless Caligula barefisted, ripping off one of its arm blades and using it as a Long Blade to fight and activate Zero Stance.