Yuko Oshima, a member of Japanese-pop band AKB48, has become more and more involved with Square Enix's Final Fantasy XIII-2 as development of the game has taken place. She's now even acting as a costume designer and beta tester for the game.
So far only two of Oshima's costume designs have been revealed; one of which will be available as DLC. Oshima will also appear in an advert for FFXIII-2 proposing her costume ideas and acting as a beta tester for the game.
The commercial will premiere on November 15th in Japan exactly one month before FFXIII-2's release on December 15th.