The Heir of the Marquis of Zhongyong and twin brother of Gu Yunci. Described as gentle and refined, warm as a spring breeze and bright as the moon. He was the favorite student of Grand Tutor Su and held the position of Junior Minister at the Court of Judicial Review. He was reported killed in action on the northern border when an enemy tunnel explosion destroyed his squad. In reality, he had swapped places with his brother on their wedding day and was the one who actually died in battle.
