<Li> The Ländler dance performed by Maria and the Captain during the party is only loosely based on the traditional Austrian dance of the same name . </Li> <P> Sources: IBDB and Guidetomusicaltheatre.com </P> <Ul> <Li> Maria Rainer, a postulant at Nonnberg Abbey </Li> <Li> Captain Georg von Trapp </Li> <Li> Max Detweiler, Captain von Trapp's friend, a music agent and producer </Li> <Li> The Mother Abbess, the head of Nonnberg Abbey </Li> <Li> Baroness Elsa Schräder "wealthy and sophisticated" and Captain von Trapp's would - be fiancée </Li> <Li> Rolf Gruber, the 17 - year - old Nazi delivery boy who is in love with Liesl </Li> <Li> Sister Bertha, the Mistress of Novices </Li> <Li> Sister Margareta, the Mistress of Postulants </Li> <Li> Sister Sophia, a sister at the Abbey </Li> <Li> Herr Zeller, the Gauleiter </Li> <Li> Franz, Captain von Trapp's butler </Li> <Li> Frau Schmidt, Captain von Trapp's housekeeper </Li> <Li> The Children: <Ul> <Li> Liesl von Trapp, age 16 </Li> <Li> Friedrich von Trapp, age 14 </Li> <Li> Louisa von Trapp, age 13 </Li> <Li> Kurt von Trapp, age 11 </Li> <Li> Brigitta von Trapp, age 10 </Li> <Li> Marta von Trapp, age 7 </Li> <Li> Gretl von Trapp, age 5 </Li> </Ul> </Li> <Li> Ensemble includes nuns, high - society neighbors of Captain von Trapp who attend the ball thrown in Elsa's honor, Nazi soldiers and contestants in the festival concert </Li> </Ul> <Li> Maria Rainer, a postulant at Nonnberg Abbey </Li>

Who are the characters in the sound of music
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