Dan Heng is a mysterious character. As part of the Astral Express Crew, Dan Heng embarks on journeys with March 7th, Himeko, Welt Yang, and the Trailblazer to explore planets and seal the Stellaron that's bringing ruin to these worlds. Dan Heng also wields a spear called a Cloud-Piercer to fight against enemies. Compared to his crewmates, Dan Heng is more quiet and reserved, and usually spends Dan Heng time alone in the Astral Express' archive room.