Dan Heng is the cold and reserved train guard of the Astral Express. Wielding a spear named Cloud-Piercer, he joined the Astral Express crew to escape his secluded past. He sleeps in the Archives room. Dan Heng is a tall, slender man with blue eyes, fair-toned skin and black hair. He is stoic, serious, and quiet. He is quite mysterious, yet in a way soft. He doesn’t like to talk about his past and is a bit standoffish, but not mean.