Which notorious SS officer did they meet at Auschwitz?

Dr. Mengele

Explanation:

They met Dr. Mengele - known as the Angel of Death in popular history for performing selections at Auschwitz and doing medical experiments on prisoners.

she is later raised by him and his wife, madame valmonde, who sees her as gift from god, as the couple cannot have their own children. later, desiree falls in love with a wealthy man, armand aubigny, and they get married.