Tenku no Arcamiles II Tester Coder no Oni

is the second volume of the Tenku no Arcamiles light novel series, written by En Mikami and Illustrated by Sumi Keiichi. It was released under the Dengeki Bunko Imprint in July 2006.

Synopsis
In front of Takuya, who was awakened as the last "Warrior of the Ark", the twin "Beast" Fire Rin and Mizuren who were ordered to recapture the "Golden Warrior" appeared. Takuya, who still cannot draw out the true power of "Golden Warrior", struggles with Hirin and Mizuren, who control ripeness and cold air, and Hinako, who has been overwhelmed by protecting Takuya, collapses. A boy, Toji, who was dispatched from << Ark >> to support Takuya, the last trump card left for humankind, appears in these two people. On the other hand, Reina, who was taken away by the "most ferocious Terion" Ruslan, met at one of Terion's bases, "Castle" ...

(source: Bookwalker JP - Translated)