In 2251 AD, one wizard commanded the entire unified world. Skilled in using thunder magic, she was given the name "Rai-jin" (the 'jin' meaning 'blade', 'god', 'fast', or 'person'). 'Rai' meaning thunder

A survivor of the disastrous suppression operation "Operation Souya 4-Go", which took place at the South Pole on July 14, 2250 AD, she was recognized for twice repelling the disastrous invasions of Nepal and Washington, and thus was a hero in the eyes of both humans and youkai. However, during the defense of Washington, she took a direct hit from a curse (the marking on her right cheek is proof of this) and lost her immortality from the miracle drug.

After taking office, she took strategic command of the battle in the alternate dimension ruins in the Bermuda Triangle, and was successful in repelling three disasters. However, there were a great number of casualties, and she was heavily wounded. Both eyes and her heart were wounded and healed, which was difficult and barely saved her life, but the eyes were taken from Luna the Fool and Elza Harmonia Necrostra, and the heart from Demon Lord Eldelita, who had all fought and died during that battle. Also, it is said that during "Operation Souya 4-Go", she lost her right arm and had an ancient dragon's arm transplanted during surgery to revive her.

With the transplant of the great ones' relics (sorcery gear) and the demon lord's heart (heart of lord), she exceeded the magic power coefficient of her master, Luna the Fool, and with casting speed rivaling that of high speed casting (quick spell rune), she rose to the same level as her master's no-casting technique. However, as the price for her damaged immortality, using high class magic would put a heavy strain on her body, and constantly confronting the disaster would require her to use high class magic, and the burden would obviously affect her body more than just that.

In the early morning of July 13, 2251 AD, gambling on the possibility of completely ending this hopeless situation, she jumped back through space/time. She never revealed what she saw, but at noon on that same day, on the land formerly known as Asia with the few remaining soldiers, the final battle operation "Operation Yamato 2-Go" was initiated.

In a flash of light that engulfed the entire world, all the surviving humans and youkai dreamed of a "future". Was it a vision produced by the thoughts of the people, or perhaps---