of the Iron Fist. Hunts after Shang-Chi for the murder of his beloved master, Lord Tuan, although he suspects the Emperor, whom he is forced to serve, to be involved. Despite his animosity towards Shang-Chi, he is shown to be just and honorable. Initially entering the Thirteen Chambers to usurp Zheng Zu, he later sets his sights on Shang-Chi to bring him to justice. After hearing the truth from Red Sai about his mentor's death, Rand-K'ai cures Shang-Chi of the poison in his body and lets him fight his father in the Thirteenth Chamber. Red Sai: Based on Elektra, she is the sai-wielding master of the Red Hand and the former lover of Shang-Chi. Due to the sacrifice made by the first master of the Red Hand, Red Sai is forced to serve as Emperor Zu's personal assassin. It is revealed that Zu had sent to her to assassinate Lord Tuan but she ultimately failed; to spare Red Sai and her students from the Emperor's wrath, Shang-Chi killed Tuan. Kitten: Based on Kitty Pryde, she is an outcast who was expelled from her school for failing to master an advanced technique, which left her permanently intangible. She later becomes a member of Shang-Chi's Lowest Caste school. She accompanies Shang-Chi in all of his fights in the Thirteen Chambers, due to her condition preventing her from interfering. Shang-Chi reveals that he was able to master the technique Kitten failed to do, which plays a vital role in his fight against Zheng Zu. Tuan: Based on the character of the same name, Lord Tuan was the previous master of the Iron Fist and Zheng Zu's hated rival. Due to his kind heart, Tuan opposed Zu for his cruelty towards K'un-Lun's magical races and even his own students, and fought him repeatedly in the Thirteen Chambers. Although unsuccessful, he humiliated the Emperor by making bleed in their last fight, leading a vengeful Zu to orchestrate his murder. Red Sai was initially sent to assassinate him but failed, Shang-Chi killed Tuan while he was meditating in order to protect her from his father. Tuan's murder leads his student Rand-K'ai to avenge his death. Lock: Based on Lockheed, he is a small, fire-breathing Chinese dragon and a member of Kitten's band of outcasts. He later joins Shang-Chi's Lowest Caste school. Callisto: Based on the character of the same name, she is the original leader of