Disclaimer: I just picked up a copy of this game, which included the pre-order bonus CD and artbook. But, I'll bring this down, if requested.
Composer: According to VGMdb, it's Shigeki Hiyashi.
Title: Angel of Pride
Game: Knights in the Nightmare
Developer: Sting
Publisher(s): Sting (Japan), Atlus U.S.A.
Home » プレイリスト » Youtube » Angel of Pride from Knights in the Nightmare