Also known as the Second Prince and referred to affectionately as little Chengze or little Zeze by Emperor Jian. He is the protagonist of the story, known for being devastatingly handsome but appearing delicate and frail. He established a gunpowder factory in Yi Province two months prior and sent letters and explosive devices to the emperor. He devised the plan to deal with the Xiongnu using gunpowder intimidation. He rarely interacts with his sisters but they deeply admire him. He is described as charming yet ruthless, with a heart more vicious than the bloodthirsty Jieyu tribe.
