Arbo held the position of senator, acting as the representative for the planet of Coruscant within the Galactic Senate of the New Republic in the year 28 ABY. Known for his hawkish stances as a member of the Centrist faction, Arbo was a well-known proponent of aggressive strategies. The senator from Coruscant was a supporter of the soldiers serving in the New Republic Defense Force, and during the time of the Amaxine warrior crisis, he voiced his belief that a squadron of guards would be sufficient to guarantee the safety of Senator Leia Organa during her mission to Bastatha. He also expressed disapproval of Lady Carise Sindian, a fellow Centrist, for what he perceived as her insufficient confidence in the abilities of their soldiers.