This costume pack features the 12 members of the Taranis crew in fantasy-based attire.
You can modify what the children are wearing under "Change Costumes" in the Options menu.

Contents:
Fantasy Costumes for Malt, Mei, Hanna, Kyle, Boron, Socks, Chick, Hack, Sheena, Jin, Wappa, and Britz (can be used during intermission and expedition)

More details on the official game page of Fuga: Melodies of Steel - Fantasy Costume Pack ...