This film, being German, inherits the - "duzen" and "Siezen" - of the German language and social custom. Translating it into English is problematic.
When student Jenny is at Frau Krüger's (b. 1926) home, a picture of Ludwig van Beethoven (1770-1827) and one of Wilhelm Furtwängler (1886-1954) can be seen on the wall above the piano. Earlier, we see a picture of Furtwängler when the young Krüger is being coerced by a member of the Nazi party to rebuke her friendship with her then student (circa 1944).
Monica Bleibtreu is the mother of actor Moritz Bleibtreu, famous for "Das Experiment" (The Experiment) and "Lola Rennt" (Run, Lola, Run). Monica herself was known for acting in the popular German television series "Tatort".