Sankhon was one of the prisoners of the Sheena Island prison, awaiting to be vivisected in order to obtain materials for the Hypnos-T Type development. He stayed alive long enough to be organized into the 20-member prison group attempting to escape. However, he was killed by gun fire after the Guards saw him escaping. His death, like the other 19, was reported as a mass breakout and riot, rather than an escape attempt.