Larz, known as Rahz in the Japanese version, is a character version of "Field-Commander Rahz". He is a member of the Steel Knight Army who defends the civilian populace of the alternate dimension from the Dark World Army in Yu-Gi-Oh! GX.
At one point in the past, Larz was captured by the Dark World Army, along with many of his comrades. He himself eventually managed to escape, fleeing the prison camp. Though the Dark World Army pursued him, he was able to evade being captured once more by using the "Justi-Break" card. He arrives back at Freed's sanctuary, grievously wounded. His children, Kyle and Gina are present, and he tells his son to protect his daughter. He is questioned by Jaden Yuki on the location of Jesse Anderson, and Larz claims to have seen a man meeting Jesse's description at the prison camp. Larz, his wounds too great to heal, then dies.