Viento, a male Human, held the position of senator in the Galactic Senate of the Republic throughout the Clone Wars era.
While serving as a Senator, Viento witnessed an attempt to murder Supreme Chancellor Palpatine while on Coruscant. Jedi Master Ronhar Kim successfully defended Palpatine. Given that the assassins had disguised themselves as members of the Senate Guards, Viento proposed the creation of a personal guard to ensure the Chancellor's safety.
During the period of the Clone Wars, Viento secretly became an ally of the Confederacy of Independent Systems, planning acts of sabotage against the speeders of numerous Loyalist senators. He also aided in the orchestration of Finis Valorum's assassination, a scheme that involved Sora Bulq, a fallen Jedi Master, and Sajé Tasha, an Anzati assassin. During this time, Jedi Master K'Kruhk was tasked with Viento's protection.
In 22 BBY, he met his death by assassination at the hands of Quinlan Vos, a Jedi who had infiltrated the Dark Acolytes. Vos mistakenly believed Viento to be Darth Sidious, the Sith Lord that Count Dooku had told Obi-Wan Kenobi about on Geonosis. Dooku had intended for Viento to be killed for attempting to betray him, which Vos misinterpreted.
Following his death, Viento's body was frozen within carbonite and placed within the Senatorial Tombs.