Tia Toon, a male senator of the Sullustan species, served as the representative for Sullust within the Galactic Republic throughout the High Republic Era. He championed his proposed Defense Force Program, as he felt the Jedi Order should not bear the sole responsibility of safeguarding the Republic, also asserting that the Republic Defense Coalition was disorganized and inadequate. Despite pushing his own initiatives, Toon insisted he wasn't against the Jedi; his sole desire was for the Republic to possess the means to defend itself should the Jedi be unable to do so. During the Republic Fair held on the planet Valo, Toon was in attendance, and he lived through the subsequent attack perpetrated by Nihil marauders, after which he vowed to assist in the planet's reconstruction.
Toon maintained that no conflict arose from his advocacy for the Republic's welfare, the interests of those he represented, and the SoroSuub Corporation, which held significant economic sway over his system's affairs.