Jedi Master Ruati was was a member of the Jedi Order during the time of the Clone Wars. Unfortunately, the war took the Jedi Master to the planet of Nauton IV where an assassin beheaded the Jedi Master. The assassin remained unknown to the Jedi Order, however Jedi Master Obi-Wan Kenobi had his suspicions. Although believed dead by most of the Order, Master Kenboi believe Ruati was killed by none other than Dark Jedi Asajj Ventress. Many thought Kenobi was believing that Ventress was alive, including his own apprentice Anakin Skywalker, who believed he, himself, had killed the Dark Jedi.
But Kenobi had been following a trail of evidence, which included Master Ruati's death, that seemed to indicate Ventress was indeed alive. Although the Jedi were never sure, in all likelihood, Master Ruati was killed by the then unknown General Grievous, droid commander of the Separatist army. After Ventress' encounter with Skywalker, while not dead, she was severly injured and incapacitated from her injuries. Master Ruati most likely fell victim to Grievous' blades not long after the General joined the Separatists and began his sweeping siege of Outer Rim territories.