Arbo was a senator who represented the planet Coruscant in the Galactic Senate of the New Republic in 28 ABY. A member of the Centrist faction, Arbo was a notorious advocate of warlike policies. The Coruscanti senator supported the soldiers of the New Republic Defense Force and—at the time of the Amaxine warrior crisis—was confident that a squadron of guards could ensure the safety of Senator Leia Organa during her mission to Bastatha.