Kroagnon

Kroagnon was the architect of Paradise Towers. He had previously designed Golden Dream Park and the Bridge of Perpetual Motion. When he created his masterpiece, Miracle City, he refused to move out, unwilling to let the residents sully his work by moving in. He was eventually forced out, but left behind booby traps that killed many of the residents. He fled to Earth and built Paradise Towers. Kroagnon's disembodied mind was exiled to the Towers' basement after he tried to prevent people from living in it. Years after most of the Towers' residents left to fight in a war, Kroagnon began using the robotic Cleaners to kill the ones who stayed behind. He eventually took over the Chief Caretaker's body, but was opposed by the Doctor. Pex sacrificed his life to kill Kroagnon. (DW: ''Paradise Towers)