*PRINCE POSITION TAKEN

Prince - There is no Princess of the Faeries unless the Prince is married. There also is no King and Queen (the Faeries have always gone THEIR way about things, you see). The Prince is very much like the King; he governs the Faerie people and is feared more than respected.
Dukes and Duchesses - They really have no more power than Faerie citizens. The only thing that sets them apart from the commoners is the fact that they get to see the Prince whenever they wish, without appointments or the like. There are four Dukes and four Duchesses, usually, and they don't necessarily have to be married to one another.
Citizens - Everybody else. That's it, really.

*PRINCE POSITION TAKEN

Prince - Much the same as the Faerie Prince. Again, no King/Queen. The only difference is that even if the Prince does marry, that does not immediately make his wife the Princess if he doesn't want her to be.
The Aged - Those who have long since touched Nothing. While they are not exactly old, they have been greatly affected by their affliction, and thus do not function properly. Much like the cancer victims of Faerie.. well.. Nithling society.
Citizens - The crowd. They either tend to the Aged, or they don't. It's that simple.

*Lord POSITION TAKEN

Lord and Lady - They don't have to be married to rule simultaneously. Often have a multitude of servants to do their bidding. They rule over the Vampire population pretty much as they please; they have functioned as a monarchy for many years.
Servants - The only servants in the Vampire world are in the Palace. They do all the Lord and Lady's chores in exchange for food and a place to sleep.
Citizens - Usually more involved in politics than Faeries. They take on a lot more responsibilities, anyway, and are hardly ever seen dancing naked in a forest, unlike some creatures.