the jumping puzzle gave one. why shouldn't the 'oh so unique ONETIME event' give one also? if not even a backpiece? a jewel? now... NOUGATS? what a joke.
Well, just be happy your sister is save. Anyways, she will hook up with you later and fight along side you.
Btw, there are a lot of different sisters. Her looks are affected by the way you made your character.
The looks are affected by the ancestry you choose prior to that mission: Ascalonian, Krytan, Elonan or Canthan