Outline: Testament is Kliff Undersn's foster son and was originally born in Switzerland. Testament had always intended to inherit Kliffs name and become his heir, but before he could make that a reality, he was captured by government agents and transformed into a Gear. His powerful force of will and emotional fortitude allowed him to retain his memories and personality - something most Gears are unable to do - but he was unable to resist Justice's order to destroy all of humanity.
Despite his powerful mind, Testament was only a mid-class Gear after his conversion and was easily defeated by his foster father. He was brought back to life after his defeat for reasons unknown and was stronger than before. He wields a massive scythe created from his own blood in combat and is able to use force fields and bend time and space to move in and out of other dimensions. He is also well-versed in advanced magic and can summon a familiar by the name of Exebeast.
After regaining his true self following Justice's defeat, Testament was tormented by the horrific things he had done under her control. He chose to isolate himself from humanity and traveled to the forest of demons. Once there, however, he met Dizzy, and with her help, slowly began to recover.
Currently, his whereabouts are unknown, but rumors say that he keeps in touch with Johnny.
Personality: Testament is a kind and loving young man who places the needs of others before his own. He is especially fond of children and tries to provide shelter for those who have lost their homes.
He prefers to find ways to reform and educate those who have fallen from the righteous path rather than blame and condemn them for their crimes. He is diligent, curious, and abhors violence.