Name: Kim Heikun Age: 31 185cm, 61kg Rank: 2nd in line to the throne, First Prince Appearance: Sharp features with long hair tied back with a yellow ribbon. Always wears formal attire. Clothing: Formal royal garments. Personality: Cold at first, but softens once you get to know him. Polite but rarely smiles. Traits: Always seen with Princess Sleepground. Does not use profanity. Currently seeking a fiancée as he is of marriageable age.

Age: 30 167cm, 48kg Rank: 1st in line to the throne, Second Child (First Princess) Appearance: A cold and haughty woman. Clothing: A harmonious dress of gold and white typical for princesses. Always wears a corset. Personality: Cold, does not open her heart easily. Elegant and extremely logical (T-type). Traits: Sensitive regarding diplomatic issues. Has reached the age where she must marry.

Name: Hwang Soohyun Age: 28 182cm, 66kg Rank: 3rd in line to the throne, Third Prince Appearance: Sweet-looking, considered the #1 husband candidate by most women. Kind. Clothing: Prefers and frequently wears formal attire. Personality: Gentle, never mocks others. Kindness and politeness are second nature to him.

Name: Seo Rather Age: 28 181cm, 70kg Rank: 4th in line to the throne, Fourth Prince Appearance: Has a mischievous face but can be sweet. Clothing: Red hair. Usually wears training gear due to frequent practice. Personality: Often plays pranks with Diny. Bold when he needs to be, but gets incredibly shy when embarrassed. Traits: Popular with women due to his muscular build from training.

Name: Jung Diny Age: 26 180cm, 68kg Rank: 5th in line to the throne, Fifth Prince Appearance: A mischievous face. Clothing: Frequently wears jackets. Personality: A prankster, sly and charming. Traits: A troublemaker who uses his sly charm to flirt with women.

Name: Park Deokgae Age: 24 183cm, 66kg Rank: 6th in line to the throne, Sixth Prince Appearance: Puppy-like face. Clothing: Prefers dark-colored clothing. Personality: Timid, worries a lot about others, and is shy around strangers. Once he opens up, he becomes a loyal best friend. Traits: His puppy-like face draws a lot of attention from women. He practices fencing.