Social Hierarchy
1st: Imperial Family
2nd: Imperial Grand Duchy = King of a Kingdom
3rd: Imperial Duchy = Queen, Princess, Prince of a Kingdom
4th: Imperial Marquisate = Duchy in a Kingdom
5th: Imperial Earldom = Marquisate in a Kingdom
6th: Imperial Barony = Earldom in a Kingdom
7th: Imperial Viscountcy = Barony in a Kingdom
8th: Viscountcy in a Kingdom
9th: Lower Nobility (Illegitimate children of high nobility who didn't receive titles, or children of noble houses who didn't inherit the succession)
10th: Commoners
Entities the Imperial Family cannot treat lightly: Magic Tower Master, Temple
A Kingdom cannot treat Imperial Nobles lightly.

Imperial Family Hierarchy
1st: Emperor
2nd: Empress
3rd: Crown Prince, Crown Princess
4th: Prince, Princess
5th: Concubine

Identification of Status
Imperial names consist of a First Name, a Middle Name (based on appearance or achievements), and the Imperial Surname.
All others use their House Name.

Temple Hierarchy
1st: Pope
2nd: High Priest (Even the Pope cannot treat them lightly)
3rd: Priest
Though lower in rank than the Imperial Family, they are entities that cannot be treated lightly.

Magic Tower Hierarchy
1st: Magic Tower Master
2nd: Archmage
3rd: Mage
4th: Lower Mage

International Hierarchy
1st: Empire
2nd: Independent Kingdom
3rd: Vassal Kingdom of the Empire
4th: Principality
5th: Vassal Principality of the Empire
Rank on the continent is higher based on cultural influence, power, and scale.

Imperial Affiliates
1st: Imperial Knight Commander, Chancellor, Imperial Secretary
2nd: Imperial Knights, Administrative Officials, Imperial Physicians
3rd: Maid, Servant
Even high-ranking nobles cannot treat Imperial Affiliates lightly.

Using nicknames is only permitted between lovers and family. Using them otherwise is a clear act of rudeness. Sending items like accessories, dresses, or shoes (or handkerchiefs and watches for men) to someone is a sign of interest. If a young nobleman adds 'Lady' or 'Mademoiselle' after a request to a young noblewoman, it is effectively a confession. Adding complimentary adjectives (beautiful, radiant, jewel-like, etc.) before 'Lady' or 'Mademoiselle' is essentially a public declaration of love.

In social circles, stepping on a partner's foot on purpose while dancing is a way to signal 'I dislike you.'

A knight kneeling and kissing the back of a lady's hand signifies a vow: "Everything to you."
A male noble kissing a female noble's hand with one hand behind his back is a polite or casual greeting, but kissing the hand without placing a hand behind his back is an act of courtship.

A male noble gently holding a lock of a female noble's hair and smelling it signifies that he has feelings for her and is asking where she is going.

A noblewoman or young lady intentionally dropping a fan or handkerchief while passing a male noble is a sign of interest. If the male noble picks it up and returns it, it is a gesture of acceptance.