A Force-sensitive male, Ban-yaro was trained in the ways of the Force at the Coruscant Jedi Temple. Attaining the rank of Jedi Knight after completing his Trials of Knighthood, Ban-yaro went onto pursue independent study as a Sentinel specialized in communications. After serving the Order for some time, Ban-yaro was made a Jedi Master by the Jedi High Council. At some point as a Master, Ban-yaro was appointed to the position of Chief Communications expert at the Jedi Temple communication center.
When the Clone Wars erupted between the Galactic Republic and the Confederacy of Independent Systems, Master Ban-yaro remained at the Temple to help coordinate Jedi Command. When Jedi Obi-Wan Kenobi and Anakin Skywalker were appointed a secret assignment by Grand Master Yoda, Ban-yaro was advised to keep all that he heard a secret so as not to endanger the pair. As Kenobi and Skywalker sent scrambled transmissions to the Temple, Ban-yaro kept the Grand Master informed of their mission on Lanteeb. When the Jedi homed in on Confederacy General Lok Durd and his deadly nanovirus, Senator Bail Organa aided Ban-yaro and the Jedi to end the Separatist threat.