A cold and reserved young man who wields a spear known as Cloud-Piercer. He acts as the train's guard on its long Trailblaze journey.

He carefully observes the changes in everything around him, albeit with a calm demeanor that may appear to be indifference. He faithfully records everything they encounter on the Trailblaze path in the Express's archives.

Danheng never talks much about his past. In fact, he joined the crew of the Express to escape from it