Yomo Vrex was an Ithorian male scientist in the Galactic Agricultural Alliance during the High Republic Era. He attended an annual meeting of the Alliance hosted aboard the Starlight Beacon space station. On the station, Yomo entered into a disagreement with fellow scientist Prot Xan, who was also an old friend. The incident became a fight, which drew a crowd and caught the attention of Administrator Velko Jahen and Chief Ghal Tarpfen, the station's head of security. Tarpfen stunned the two scientists; while Sh'nar Qwasba, the Alliance's president, was infuriated, Jahen assured her that the two would be transported to Starlight's medcenter.