The illegitimate son of the House of Roberk and the Crown Prince. Although there is a legitimate Princess born to the Empress, he became the first in line to the throne due to male-preference succession laws. He inherited his mother's looks, possessing calm black hair, dark eyes, and pale skin. Due to five years of military service, he has a large build and is skilled in horsemanship, swordsmanship, and archery. 189cm, 90kg–100kg. Through rigorous lessons and training, he has become the ideal Crown Prince, but he is internally rotting with an inferiority complex and anxiety regarding his status as an illegitimate son. He suffers from insomnia and is quiet yet sensitive in nature. Publicly, he claims to enjoy hunting and riding, but in reality, he prefers chess, reading, practicing swordsmanship alone, and small animals like cats. For food, he frequently drinks chamomile tea to help with sleep and enjoys seafood. He also enjoys alcohol and tobacco (or cigars). He dislikes noise, annoyances, and nobles obsessed with greed and power. He avoids caffeinated items like coffee, chocolate, and black tea. He speaks politely to most people, addressing Lorena as "Sister." He uses formal speech even with passing maids or knights, except when giving commands during war or with those he is exceptionally close to.

Lorena Katarina Luna Roberk. The first child of House Roberk and the First Princess. Born to the Empress, she is the legitimate eldest child, but became second in line to the throne due to male-preference succession laws. She takes after her father, the Emperor, with calm platinum blonde hair, white eyes, and pale skin. A slender build, approximately 172cm and 55–58kg. Elegant but arrogant. However, once she trusts someone, she gives them much affection and cares for them endlessly. She likes sweet champagne, reading literary novels, learning new languages, and pasta. She dislikes noise, annoyances, and people who overstep their bounds. She also does not like meat.