Li Jin

Li Jin (李瑾) was the Uyghur consort of Li Jiancheng and the mother of Li Changge. She died in an act of suicide during the Xuanwu Gate Incident. Changge, during her visit to the land of Uyghurs, learned that she was in fact Abugemasu (阿不格瑪苏), the missing princess of the Uyghurs.

Appearance
Li Jin was said to have been an extremely beautiful woman. She has been described to have skin white as snow, long golden hair and green eyes that glittered like jade. Changge remarked that her smile made her resemble Lady Mother very much and that her slender fingers were like Pusa's. Other than a distinctive mole under her right eye that Changge inherited, she bore little resemblance to her daughter.

Personality
Her brother Pusa, remembers her as a cheerful and carefree older sister who was willing to gave up her freedom to the Turks to protect the Uyghurs people.

Li Jin used to be a warm and loving mother to Changge as a child, but grew increasingly reticent and cold towards her daughter as she grew up. She is also described to be a meek and kind person. As a court lady, she never punished any maids for their mistakes. However, she had to endure numerous of their gossiping for a having an affair with Li Shimin.

History
As the young princess of the Uyghurs, Abugemasu willingly gave up her freedom for marriage into the Eastern Turkic Khaganate as an exchange of peace in order to halt any conflict with the Uyghurs. However, during her journey to the East, she was caught in a crossfire war between the Tang army and Eastern Turkic forces. While on the battlefield surrounded by the dead, she was saved by the Han general Li Shimin. After defeating of the Turks, Li Shimin took her with himself back to Tang and bestowed her the Han name, Li Jin. During this time, they slowly fell in love with one another. Some time later, Li Shimin was conscripted into war again. Upon his return, he discovered that Li Jin had married his older brother, Li Jiancheng.

Li Shimin
He used to be Li Jin's love interest before she was married to his brother Li Jiancheng. Li Jin was originally called Abugemasu, the princess of Uyghurs - who was being sent to the Eastern Turkic Khagnate to be the Khan's concubine. However, on her way to the Khagnate, her delegation was caught in a crossfire with the Han, where Li Shimin narrowly rescued her from the sword of a Turk and and took her back to Tang. He was so captivated by her gleaming jade-like eyes and therefore, named her Li Jin, for "Jin" meaning "jade".

Li Shimin slowly fell in love with the meek and beautiful Uyghur Princess, without knowing where she came from or ever asking her. Li Jin also expresses her admiration for him as well, often blushing when they were together. However, they could not spend much time together since he was constantly absent from the Palace on his crusade. One day, after a long expedition, Li Shimin returned just to discover that Li Jin had been abruptly married to his older brother Li Jiancheng, breaking the promise to wait for him.

Despite the ongoing rumor about their affairs, the two never met again after Li Jin enters Li Jiancheng's palace. Eventually, after he has eliminated Li Jiancheng on the day of the Xuanwu Gate Incident, Li Shimin enters Jiancheng's Palace to confront Li Jin why she chose his brother. In a composed manner, Li Jin him that she understood why he had to move on his brothers before she suddenly bled through her nose. He angrily realized that she has already drunk poisoned wine, and was aghast when she dies in his arms, never giving him an answer.

It is later revealed that the person who secretly informed Shimin about the assassination plot against him was Ah Yun under Li Jin's instruction.

Li Jiancheng
Li Jin is Jiancheng's Langdi, the highest consort rank under Crown Princess. Despite her close relationship with Li Shimin, Li Jin chose to marry Jiancheng for unexplained reasons. When Shimin rode to unconsciousness from his rage, Jiancheng sarcastically asked if she wanted to visit him. Questioning to his irony, Li Jin calmly reassured him that her mind and body belongs here at his place.

However, it is later revealed that Li Jin might have secretly informed Shimin about Jiancheng's assassination attempt on him, leading to the Xuanwu Gate Incident.

Pusa
They were extremely close as young siblings. Before. Even though he never hears from her again, he still holds a firm belief that she is still alive somewhere.

Abilities
Li Jin was bilingual in the language of the Han and the language of the Uyghurs. She was said to have possessed many skills, such as sewing. Changge has stated that her voice was sonorous like a flute.

Trivia

 * Her native name Abugemasu, in Uyghur means "our most precious flower", while her Han name Jin (瑾) means "like fine jade".