The nights were the hardest. Caligula suffered from chronic insomnia and expected his staff to share it. They would wander the labyrinthine corridors of the Palatine Hill, the Emperor talking to the moon as if she were a fickle lover. One moment, he was a philosopher, quoting Homer with tears in his eyes; the next, he was a tyrant, ordering a senator’s execution because the man’s sandals creaked too loudly.
Lucius survived by becoming a shadow. He learned to anticipate the shifts in the Emperor's "divine" weather. When Caligula declared himself a god and demanded to be addressed as Jupiter, Lucius didn't flinch. When Caligula ordered a bridge of ships to be built across the Bay of Baiae just so he could ride across it in the armor of Alexander the Great, Lucius simply calculated the tonnage of grain ships required. [S4E1] Working for Caligula
He had been assigned to the personal staff of Gaius Julius Caesar Augustus Germanicus—better known to the shivering masses as . The nights were the hardest