We’re swimming in a sea of trademarks from Square Enix and the latest one is Hikari to Yami no Senshi or Warrior of Light and Darkness in English.
I don’t think Square Enix would release a game just called Warrior of Light and Darkness so I’m going to guess this is a subtitle. But, what franchise is it for? Final Fantasy Gaiden: Warrior of Light and Darkness? Dragon Quest: Warrior of Light and Darkness?
Wait a second… Square Enix also re-trademarked Tactics Ogre in Japan on the same day. Could this be for Tactics Ogre: Warrior of Light and Darkness?