She is (indirectly) featured as his actual sister (both are played by the same actor, Günter Meisner).
Günter Grass | Sanford Meisner | Günter Brus | Randy Meisner | Günter Wand | Gunter Pauli | Verne Meisner | Lorne Gunter | Heinz-Günter Amelung | Günter Verheugen | Günter Müller | Günter Lenz | Günter Eich | Carl Gunter | Andy Meisner | Thomas M. Gunter | Robert Gunter | Michael M. Gunter | Joachim Meisner | James Gunter | Günter Zeitler | Gunter Van Handenhoven | Günter Strack | Gunter's Tea Shop | Gunter Sachs | Günter M. Ziegler | Günter Meisner | Günter Litfin | Günter Guillaume | Gunter Gabriel |