Muthrs, or Multi-Utility Task Help Robots are robot-human hybrids, designed to help raise human children made from artificially fertilized embryos. These robots look ordinary, but they have human nervous tissue and organs. They run off of Centurion Power Cells. A notable MUTHR was MUTHR-06, known as muthr. The MUTHRs were created for the human repopulation project by Cadmus Pryde. They could not leave their sanctuaries unless an official such as Cadmus told them they could.