Colonel Robert Watts was a human rebel and leader of the Eridanus Rebels.
Formerly a member of the UNSC, Colonel Watts became a turncoat and a traitor some time before 2513, abandoning the military and joining the Eridanus Rebels. He led an insurrection in the Eridanus Star System, which lasted for a number of years. Soon, though, he and his forces were put down in a battle called Operation: TREBUCHET.
He eventually became the leader of the rebels and governor of the rebel stronghold of Eridanus Secundus. He ensured that his operation ran smoothly and that it remained relatively hidden from the UNSC. This all changed when one of his spies was discovered. In 2525, he was captured by a team of Spartans who sedated him using Polypseudomorphine and brought back to ONI for interrogation.
He enjoyed luxury items, such as Sweet William Cigars and Beta Centauri vintage champagne. It was this vanity that halped the Spartans quickly locate and secure him.