Author's Note: Repairbot HU1V14N-42 - seen here repairing another HU1V14N-42
Nobody knows exactly how this robot came to be, it's always debated wether it was invented by someone with great skill, or if it was the product of nanotechnology.
It seems it only exists to repair others of it's kind, or break down and await repair from another.
They also are able to pair up and create a third 42.
It's known (from the scanning of it's worklog) during times of breakdown, it contemplates it's own existence, and searches for a reason why.