PS4 The Idolmaster: Platinum Stars ‘Chihaya Kisaragi’ character trailer Second in 13 idol character introduction videos. The latest The Idolmaster: Platinum Stars character trailer introduces Chihaya Kisaragi. The first trailer introduced Takane Shijou.The PlayStation 4 idol training game is due out on July 28 in Japan. If you missed it, catch the latest information blasts here and here. Watch the trailer below.