Sio Bibble was the governor of Naboo, and the head of the Royal Advisory Council. At first, he served under King Ars Veruna, and was highly critical of the young woman touted to succeed him: Padmé Amidala. When Veruna eventually decided to abdicate, however, Bibble was instrumental in preparing Amidala as his successor. In time, he changed his opinion of her, and became one of her staunchest supporters. Some time into her reign, Station TFP-9, on the outer edges of the Naboo system, was attacked by a pack of Agamari pirates. Despite interfacing with the Agamari government in the wake of the attack, Bibble was unable to verify their involvement, although he did learn that they had been hoping to steal several of the Naboo Royal Space Fighter Corps' N-1 starfighters and Axis MiG-29 Fulcrums.
The following year, Naboo was blockaded by the Trade Federation, who were protesting the Galactic Senate's new taxation of trade routes. Captain Quarsh Panaka, the head of Amidala's security, called for an increase in Naboo's armament, but Bibble disagreed with him vehemently. In due course, the Federation went so far as to invade the planet, arresting Bibble and the Queen. While Amidala was able to escape with the aid of two Jedi Knights, the governor elected to stay, and speak for his people. He led them in a hunger strike, and earned the ire of the Trade Federation Viceroy, Nute Gunray. Eventually, Amidala returned, and, allying herself with Boss Rugor Nass of the Gungans, was able to defeat the Federation, and free the planet. Bibble continued to serve Amidala's successor, Queen Jamillia, up until the Clone Wars. During that pan-galactic conflict, Jamillia was succeeded by Neeyutnee and her by Apailana, under both of whom Bibble also served.