I don't know which movie you're referring to because you didn't provide any relevant information. But I can tell you something about novels and movies. Ouyang Tianlong, Tangning and Ouyang Xue 'er appeared in the novel' Lord Snow Hawk'. This was a fantasy novel about a young man named Yun Fan who fought with all kinds of demons and ghosts after transmigrating to another world. In the novel, Ouyang Tianlong, Tangning and Ouyang Xue 'er were important characters in the main character's team. The relationship between the three of them was extremely complicated and had a deep emotional bond.