Nights of Azure is an Action RPG for the PS4 (although there is a PS3 and Vita version only in Japan) developed by Gust and published by Koei Tecmo Games. It was first released in Japan on October 1 2015, while the American and European versions were released on March 29, and April 1 2016 respectively.
The story follows Arnice, a half-human half demon hybrid who serves the Curia, an organization responsible for fulfilling the ritual that involves sacrificing a “Saint” to cure the endless nights that befell on Rusewall Island, the place in which this game takes place. The endless nights were caused by a certain monster who spilled out “Blue Blood” which polluted the humans and turns them into demons. With best friend Lilysse chosen to be the Saint, Arnice’s role is to protect her and making sure the ritual is carried out. While Arnice does fight demons and mythical monsters to progress to different areas, she also meets people that, one way or another, aid her in her journey. She also tackles her own problems and feelings towards her best friend, and debates about whether to save her, or save the world instead.