Song-yeon is portrayed as a beautiful, kind, and intelligent young person. She manages to rise from a lowly damo to a real Bureau artist and later to becomes one of the highest ranking women in the country, second only to the Queen. Titles: Seong(Ga) Song-yeon (Song-yeon of the Seong clan→성(가) 송연), Seong Sanggung (Court Lady Seong→성 상궁) So-yong Seong-ssi (Royal Consort So-yong of the Seong clan→소용 성씨), Ui-bin Seong-ssi (Royal Noble Consort Ui of the Seong clan→의빈 성씨) Park Dae-su (played by Lee Jong-soo and Kwon Jung-Min) King Jeongjo's favorite military officer. Dae-su was originally a junior eunuch in the palace. Because he wasn't castrated, he wanted to leave. When he tried to flee, he met Song-yeon and San. Like Song-yeon, he too got kicked out for helping San. Song-yeon and Dae-su know each other very well, as they practically grew up together. Both are orphans, but Dae-su's uncle raised them. When Song-yeon entered the Bureau, Dae-su took the military exam and became a palace guard of the Crown Prince. From there, Dae-su was promoted until he became the Grand Commander of the Dragon Guard, the finest army division in Joseon and the King's personal guard. Dae-su started out very dumb and dependent, but when he took the military exam, his tutors helped him become a decent man; intelligent, independent, and calm. Without this change, he might have become a simple street thug. Dae-su is extremely supportive and defensive of San and would beat up anyone who dares to insult him. He is one of the three military guards who always loyally follow the King. The other two military guards are Kang Suk-ki, a perceptive archer, and Suh Jang-bo, a stubborn fighter. Song-yeon is Dae-su's love interest, but he gave up trying to court her after he realized that she is in love with San. He was alive during the reign of Yi San's son, King Sunjo and was implied to have joined them in the afterlife soon afterwards where they played together again as children. It is possible that he is based on Baek Dong-soo, a bodyguard who was famous for saving King Jeongjo on multiple occasions. Lady Hyegyeong (played by Kyeon Mi-ri) Jeongjo's mother. She is the daughter of high-ranking court official Hong Bong-han of the Pungsan Hong clan. Ever worrisome over the royal family and the people, she is a model mother of the Joseon upper class.