Brenn Xonirr, father of Yhin Xonirr, was a corrupt man. He abandoned responsibility as a father to secretly live the high life when Yhin was just four years old. He then sold Yhin two years later to save his own life. Eventually, he found his way to being regent for a project relevant to the Mandate on Cather. This was the final betrayal that Yhin could handle. Yhin killed Brenn in 3949 when he discovered what he was doing.