Arpeggio has appeared only in Sly 2: Band of Thieves.
Arpeggio's ultimate goal is to gather all of the Clockwerk parts and use them to make himself immortal. He needed to gather all of the parts, as well as create enough hate to power the Clockwerk frame. This was achievable with the help of the rest of the Klaww Gang. He kept his master plan as a secret from the rest of the members. During the Cooper Gang's second encounter with Jean Bison, all of the parts they got were stolen by Jean Bison and then sold off to Arpeggio.
Arpeggio stored the Clockwerk parts on his blimp, with them being held together by two spinning magnetic inducers. Bentley devised a plan to reverse the polarity of the magnetic inducers, which he hoped would make the parts fall apart. However, this made the parts fall and lock into place. Arpeggio was about to fulfill his plan when he was betrayed by Neyla, who fused with the Clockwerk parts and became Clock-La. Before Arpeggio can make a threat to try and get Neyla out of Clockwerk, he is crushed by Clock-La's beak and killed.
