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

Contents:
Way of the Sword 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 - Way of the Sword Costume Pack ...