Princess Deokhye of Korea, the last princess of the Korean Empire led a very tragic life too. Her father, Emperor Gojong died suddenly on 21 January 1919. In 1925, she was taken to Japan in the pretense that she would finish her education there. 4 years later, she heard the news of her mother's death. Finally, she was given permission to temporarily go back to Korea to attend her mother's funeral however, she not allowed to wear the proper clothing.
In 1931, she was decided to marry a Japanese Aristocrat Count Sō Takeyuki, by Empress Teimei. The marriage was postponed because of her condition (her physician diagnosed her illness as precocious dementia.)
She gave birth to Countess Sō Masae in 1932 and just a year after she was again afflicted with mental illness.
After the defeat of Japan in the World War II, the peerage system was abolished and her marriage no longer made sense. So, she and her husband divorced in 1953. Her daughter was so affected with the divorce and disappeared in 1956 and reportedly committed suicide. This yet again took a toll on the Princess' health and her condition deteriorated.
In 1962 at the invitation of the South Korean government, she cried while approaching her motherland and despite her being mentally ill, she accurately remembered court manners.
She died in 21 April 1989.