Cal Omas was a male Alderaanian politician who served as the last Chief of State of the New Republic, and the first of the Galactic Federation of Free Alliances, of which he was a founder. He began his service in galactic affairs when he joined the Alliance to Restore the Republic following the destruction of his home planet. He succeeded Leia Organa as senator in the New Republic, and served in that position for several years, until Chief of State Borsk Fey'lya's suicide on Coruscant during the Yuuzhan Vong attack on the capital.
Omas's peers in the Republic elected him as Fey'lya's successor, and although the New Republic would soon become the Galactic Alliance, the Alderaanian's leadership would see the end of the destructive Yuuzhan Vong War. However, peace was a rarity in the galaxy, and not more than five years later, trouble brewed in the Unknown Regions. The Dark Nest Crisis would not only pose problems to the Alliance externally, but would also create a rift between the government and the Jedi. Omas himself clashed, on several occasions, with Jedi such as Kyp Durron, Kenth Hamner, Jacen Solo, and even Luke Skywalker himself. Though the rift was eventually healed, the wound would be opened up again in due course.
When the Alliance was faced with the threat of secession by the Corellians, Omas found himself accosted from all sides. Jacen Solo teamed up with Supreme Commander Cha Niathal, and began chipping away at Omas's government. The Chief of State could do little to retaliate, but when his opposite number in the Corellian government, Dur Gejjen, contacted him for peace talks, Omas saw an opportunity. However, his efforts to work with the Corellians to remove Niathal and Solo were disrupted by soldiers acting on Solo's orders. The upstart Solo then had Omas arrested, and he and Niathal replaced the Alderaaniaan as Joint Chiefs of State. To add insult to injury, Solo told young Ben Skywalker that Omas was responsible for the death of Mara Jade Skywalker (whom Solo himself had killed). Ben did not believe Solo, but he considered killing Omas to get near to Jacen, breaking into his prison cell. Before he could, however, Omas told Skywalker of Solo's duplicity, and then deliberately fell on Skywalker's saber, bringing the young man to the resolution he sought, and allowing him to regain the trust of Jacen Solo. He was survived by his daughter, Elya Omas.