Nima'tar

 Nima'tar was a female green skinned Twi'Lek who was Jabba the Hutt's slave dancer just before the position was filled by Oola.

She was the lead signer in a band, which had toured the galaxy and ended up playing for Jabba the Hutt. She toured with the band to pay for her tuition and the time to share her thesis.

Her band sold her into slavery to get off-world and Nima'tar remained Jabba's slave, working on her thesis. Then, that fateful day when Oola arrived. She took advantage on Jabba's short attention span and slipped out the back door, thanks to Lando Calliresian's aid.