Aurelius

 was locked up with Romana II as he was found guilty of clan-destination, the crime of having independent thoughts. This had been a law since the introduction of the Babble Network.

Aurelius didn't want to join the network, but he eventually did so because of his paranoia, prior to it becoming compulsory. He was to have his implant repaired. Aurelius was actually used by the Prolocture to find the rebels. When the Prolocture was overthrown, he returned to his former self. (AUDIO: Babblesphere)