Alberta is demon who works for the US Forces. She was born in a lower-class family. She is pursuing a vampire named Baroness Mazie, who cursed her brother and turned him into a monster. She also helps the development of anti-demon weapons at the Defense Science Laboratory, Japan's branch. She is characterised by pale skin and pointed ears. Her race is known among demons as "dark elves".
Taimanin Asagi Battle Arena
In a near-future Japan where demons, ghouls, and dark beings roam... The ancient agreement of mutual non-intervention between humans and demons has begun to fall apart as mankind derails to the dark path. Humans and demons have colluded in criminal gangs and corporations, causing havoc and bringing forth an age of chaos. But those who follow the path of virtue have not been left powerless. The government created an organization composed of ninjas with demon-slaying powers to fight the evil forces that plague the world. Those ninjas were known as the Taimanin. In the world where darkness roams, a man of ambition and strength has risen to destroy the equilibrium of the three ruling forces and conquer the world.