In ancient Rome, it was said that emperor Caligula was insane because he named his horse a consul

[WarGamer]

22. I read Winterlings book on Caligula...

He argues that Gaius was shaped by a terrible childhood, gained tremendous psychological self control while Tiberius was systematically killing his Mother and siblings... and evidence suggests that during his time in Capri he became close to his sister, Drusilla (later accused of molesting her) and after her illness and death, he snapped... he proclaimed she was to be regarded as a Goddess and those who didn't properly mourn her would be killed.

The main battle was the Senate vs Gaius Caligula... the Senate hated him. The public loved him. He was the final leader on the Julio-Claudian line after Julius Caesar, Augustus and Tiberius

Interesting note... historians say the tale about Gaius riding his horse across the Bay of Baiae atop a wooden platform aligned on top of hundreds of boats floating in the bay... was probably true.