The teenage son of Dr. Eckermann. His mother had died in his youth, leaving him starved for a positive female role model in his life, and his dad had neglected his feelings. Upon his death of a disease, Karl's mind had taken over the Sphinx computer system and would be attracted to 003 when the 00 cyborgs visited Computopia. He would attempt to kill 009 and the others, to have 003 to himself, but would eventually have his memory core destroyed after 003 convinced him that his feelings were not that of actual love but possession. In the epilogue of the manga, it is revealed that some part of Karl/Sphinx survived, and inspired by 003's words, has been creating robotic clones of her and 009 to be the rulers of the city. (Source: Cyborg 009 Wiki)