The Military DLC is one of three DLC's availible for the game Gravity Rush. It costs $3.99 in the North American Playstation Store to download. The DLC adds a new costume for Kat to wear, along with four new missions and eight new trophies for the player to collect. It has recieved near perfect reviews on PSN.
Since Yunica addresses Kat by her military name " Sea Cat" in Gravity Rush 2, it is implied that Kat's military adventures is this DLC is in fact canon. Further enforced by Permet being elevated to an important character whom Kat recognises in the sequel.