Otto Kreiner was the brother of Jurgen Kreiner, the husband of Muriel Tarr, and the father of Fitz Kreiner. He was born in Germany, but fled to England to escape the Nazis. When World War II broke out, he faced persecution for his nationality. (PROSE: The Taint) Due to his treatment by the British, Kreiner sometimes wished that he'd never left Germany. (PROSE: Frontier Worlds)