Kishin Houkou Demonbane is a Japanese visual novel and anime series developed by Nitroplus. The story blends elements of mecha, magic, and Lovecraftian horror, following Kurou Daijuuji as he partners with the sentient grimoire Al Azif to battle supernatural threats using the giant robot Demonbane. Known for its unique mix of genres and references to Cthulhu Mythos, Demonbane has spawned several adaptations and spin-offs.