Nine

Arata Kokonoe, also known simply as "Nine" is, along with his childhood friend Hisami Touji or "Twelve", the primary antagonist of the anime Zankyou no Terror and co-member of the terrorist group known as "Sphinx". Little is known about Arata's past, except for the fact that he grew up in an orphanage with Touji, and escaped along with Touji after the orphanage was destroyed in an explosion. It is possible, given their young age and great skill with explosives that the orphanage was some sort of illegal covert terrorist training ground. Arata and Touji were responsible for the theft of weapons-grade plutonium from a reprocessing plant in Aomori, as well as a series of terrorist attacks in Tokyo, including the destruction of one of the Tokyo Metropolitan Government Towers using thermite bombs, as well as a number of bombs planted throughout the city, whose locations are always described in a riddle posted on an online video sharing website. In spite of their massive amounts of destruction of public property, Arata and Touji attempt to avoid civilian casualties, often manipulating the situation so the target building in evacuated before it is destroyed. In spite of this, Arata owns a handgun, suggesting he will use lethal force if given no other options.

After that attack, Arata and Touji are joined by Lisa Mishima, a frequently bullied loner girl, who they rescue from the Tokyo Government Towers, and later grows attached to Touji. Arata and the rest of Sphinx are pursued by the Tokyo Metropolitan Police, including expert detective Kenjirou Shibazaki, as well as an American unit from the FBI, and a mysterious girl known only as Five, who seems to know them, and, while ostensibly working with the FBI, views the hunt for Arata and Touji as a game, and is willing to place innocents in danger in order to trap them.