Prince/Princess

Spouse: Prince or Princess   Children: the Heir - typically the firstborn - is a Viceroy Duke. Other remaining children are Duke or Duchess

Requirements

Typically a Prince of Princess is a hereditary title, with the oldest child - the Viceroy - eligible to take up duties once they've reached the age of majority. Until then they are Duke or Duchess.   Often they will spend their late teens and early 20s living in the capital, shadowing local levels of government and learning the laws and customs of their people. It is expected of them to also join the military as an officer and have an understanding of combat and strategies.

Duties

Ruler of a Principality(Princedom) or country. Either gender can be awarded the title and are equal in ruling

Responsibilities

Princes and Princesses are tasked with the management of a princedom. Princes and Princesses are military trained, and may be called into leading troops in conflicts. They are responsible for working with the Barons and Baronesses that govern the cities in their land, and the Marquis, Margrave, Counts and Countesses that see to the counties, and the Dukes and Duchesses  that oversee the duchies and militaries. They need to make sure these groups of civilians live in harmony with each other, and that the needs of all are met.  

Accoutrements & Equipment

Princes and Princesses are entitled to wear a crown if they so desire. In the Eastern Gates Empire is still a common practice, while in the West Archway Kingdom it is typically only worn for the most formalist of occasions - state funerals, royal weddings, or coronations, or when meeting with other nobles.

Grounds for Removal/Dismissal

Princedom is a lifetime position, that is held until one's death. While rare, a Prince or Princess may wish to hand responsibility over to their adult children and retire. This is usually after the royal counple are both over 70, and again, is quite rare.
A living but retired Prince would be called a Prince Emeritus. A living but retired Princess would be called a Princess Dowager
Type
Nobility, Hereditary
Form of Address
Your Highness
Alternative Naming
Prince, Princess
Length of Term
life
Reports directly to
Sovereign Queen