Ji Chengtan is a young man who is a distant nephew and adopted son of the Fourth Prince. His brother is a close confidant of the Fourth Prince and holds a high position in the prince's household. Ji Chengtan has romantic feelings for Su Ci and took the risk of secretly leaving to rescue her from the drought in the military town. He is described as having a handsome face and being somewhat inexperienced in political matters. Ji Chengtan is intelligent enough to deduce that Su Ci is the one who can find water and food, based on observing splints on Yang Yanzong and Su Di's hands that matched a splint he had previously seen Su Ci make. He keeps this secret from others, including Liang Shen, out of concern for Su Ci's safety. Despite his good intentions, his actions could endanger both him and Su Ci given the political enmity between their families.
