Doctor Nycolai Kinesworthy was a cyberneticist who worked to develop advanced combat droid technologies for the Galactic Empire. Working from the Myyydril Caverns of Kashyyyk, Kinesworthy used the remains of General Grievous to create N-K Necrosis. When Necrosis was stolen by his colleague, Treun Lorn, Kinesworthy looked to a group of spacers to destroy the droid. When they finished the task and returned to him, Kinesworthy was noted as murmuring something about a "master".