A beautiful top-ranked investigator who leads Team One of O.C.S.A.T. - Organized Crime Special Assault Team -, an armed special force countering organized crime. She is also known as "Steel Shelled Ai". Her body is enhanced with nanomachines that gives her superhuman abilities and the ability to use her limbs as weapons. Ai is also Sawamoto Miwako's biological daughter, but they feel distant from each other despite that fact.

Iron-shelled Ai
The training of the strongest police investigator, and changing her subconscious mind into that of a sow. ----- Fujisaki Ai, the feared police investigator with the alias "Steel Shell Ai", has the ability to metalize her limbs into formidable weapons thanks to nanotechnology enhancements. For many years she has been hunting the enigmatic criminal organization "Sacrifice", which kidnaps women. Their female victims are often the famous: actresses, celebrities and sportswomen.
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.