One of the currently known forms of paid download content for the PS3 and Xbox 360 versions of Persona 4 Arena is voice navigators, voice packs which replace the main navigator voice. For a sampling of the DLC, you'll want to try out the arcade version of Arena, as Atlus released navigator DLC for the game today.

Kuma and Mitsuru are now available to arcade players for 600 Persona moneys each. Once you have the special navigator voice, you can set it on the character select screen.