Dr.O

he is a character from new Vegas's DLC old world blues, doctor 0 is a pre-War doctor that became a think tank to continue his work at Big MT. Doctor 0's scientific specialty is in robots, both in construction and deconstruction. He also has a large hatred for Mr. House and his founded company, RobCo Industries. As a result, he built Muggy with the intent of mocking House's securitrons. He also recognizes the Pip-Boy latched around the Courier's left wrist and would have forcefully removed it out of spite, if he still had hands. Upon dialogue with Dr. 0, the Courier discovers that his name is not Doctor O, but Doctor (Zero), and everybody has been reading his name wrong.