Backstory
Bob was a military computer. A new type of advanced AI, Bob's main function was to "shoot stuff." Finding a major defect in Bob's systems, military officials and scientists working on the project put Bob into storage. The mysterious owner of the Mall stole a high powered laser from the military base were Bob was stored as well as the system he was stored on.
Bob still carries the defect to this day. Simply put, he doesn't like to shoot stuff unless annoyed. He is the main computer for Prophet's Place as well as a fill in shop keeper. He has a body constructed of aircraft aluminum, a small experimental power supply, wing and boot jets for short flights, and a heart full of gold. It is unknown as to if he still has the laser... no one really wants to be the person to find out.
Trivia
If you look around the webcomics world, you'll find an interesting effect on some of the funny comics and gag-a-day's. There tends to be at least one robot character in them. 4 out of 6 of the one's I read have had an automaton as a main or secondary reoccurring character at some point in time. That's were Bob comes in.
Bob was the product of too much time playing Megaman and too many webcomics. His only saving grace is that I equipped him properly, not just tossing out "Hey look! A Robot!" backstory. Plus, he's shiny. People dig the shiny. = P
Like other old characters, BOB made it into another project - Biff the Vampire. He may not be a formerly killer robot but he did retain his heart of gold.