
Five is a government operative and a nuclear scientist affiliated with NEST, an organization within the United States FBI. She travels to Japan to assist in investigations regarding the terrorist attack. Five is childishly sadistic, having fun in making people suffer and usually portraying a cold demeanor. She also likes playing psychological games, as shown when she transformed an airport into a chess board in order to "play" with Sphinx. On a deeper level, though, her actions may suggest she is a very lonely person who actually wishes for some human connection, especially from Nine - whom she seems to have always admired or, at least, respected as a worthy opponent - probably due to feeling abandoned by Sphinx. This is reinforced by the fact that she is seen to struggle emotionally when Twelve tries to save Lisa, and by her apparently obsessive "pursuit" of Nine.

Terror in Resonance
Painted in red, the word "VON" is all that is left behind after a terrorist attack on a nuclear facility in Japan. The government is shattered by their inability to act, and the police are left frantically searching for ways to crack down the perpetrators. The public are clueless—until, six months later, a strange video makes its way onto the internet. In it, two teenage boys who identify themselves only as "Sphinx" directly challenge the police, threatening to cause destruction and mayhem across Tokyo. Unable to stop the mass panic quickly spreading through the city and desperate for any leads in their investigation, the police struggle to act effectively against these terrorists, with Detective Kenjirou Shibazaki caught in the middle of it all. Zankyou no Terror tells the story of Nine and Twelve, the two boys behind the masked figures of Sphinx. They should not exist, yet they stand strong in a world of deception and secrets while they make the city fall around them, all in the hopes of burying their own tragic truth.