This DLC contains the hero attire: Dragon Shadow, Flying Fish.

A serpentine flying fish shaped like a pig. It is said to be endowed with the ability to withstand thunder and weapons. The emperor of the east created a spy service whose members served under the royal family. On solemn occasions, those specifically allowed would wear it to show their honor and status.

Note: This changes only the wearer's appearance, not their attributes.
The above DLCs can be claimed by talking to the Town Crier in a capital or the Trade Colonies after purchase.