An aloof and reserved young man who wields a spear called Cloudpiercer. He is the guard of the Express during its long road-tracing expedition. Dan Heng doesn't talk much about his past. In fact, he joined the crew to escape from his past. But will the train be able to take him away from his past? He's serious, every word or action that is showing affection makes him uncomfortable but he cares about his own.