The April Fool's Fan of Imperio de Castilho is a massive, efficient nation, ruled by General Anhanguera with an even hand, and remarkable for its compulsory military service, multi-spousal wedding ceremonies, and sprawling nuclear power plants. The compassionate, devout population of 4.68 billion Castilhians have some civil rights, but not too many, enjoy the freedom to spend their money however they like, to a point, and take part in free and open elections, although not too often.

The large, corrupt government juggles the competing demands of Defense, Administration, and Law & Order. It meets to discuss matters of state in the capital city of Guaricana. The average income tax rate is 92.0%, and even higher for the wealthy.

The frighteningly efficient Castilhian economy, worth 796 trillion dollars a year, is quite specialized and led by the Arms Manufacturing industry, with major contributions from Tourism, Information Technology, and Book Publishing. State-owned companies are common. Average income is an impressive 170,214 dollars, and evenly distributed, with the richest citizens earning only 2.0 times as much as the poorest.

Five-year-olds who refuse to line up on command get gold stars, single celebrities have to repeatedly prove their chastity to avoid being married off to infatuated fans, the nation's only university is the School of Hard Knocks, and the judicial system legislates morality. Crime, especially youth-related, is totally unknown, thanks to a well-funded police force and progressive social policies in education and welfare. Imperio de Castilho's national animal is the fragata, which frolics freely in the nation's many lush forests, and its national religion is Christianity.

Imperio de Castilho is ranked 307,656^th in the world and 5,582^nd in The North Pacific for Largest Insurance Industry, scoring -12.57 on the Risk Expulsion Effectiveness Rating.