Rabe was an NPC, one of Queen Padme Amidala's handmaidens.
The Phantasmal Malevolence Edit
When the Trade Federation invaded Naboo, Rabe was taken prisoner along with the Queen and the rest of her handmaidens. They were being forcibly escorted across the Palace's inner courtyard by Combat Droids when they were rescued by the Jedi Qui-Gon and Obi-Wan. They all managed to make it to the royal barge in the palace hangar, and took off, fleeing Naboo. Rabe was with the group when they flew to Tatooine and then to Coruscant, but took no part in any of the action, staying on the ship the whole time it was on Tatooine.
On Coruscant, the young Tatooine boy Anakin came to the Queen's chamber wanting to speak to her handmaiden, Padme. He ran into Rabe instead, who told him Padme wasn't there. The Queen called Rabe, asking her who was there and she told her. The Queen came forward telling Anakin that anything he wanted to say to Padme he could say to her (there's a hint that this is the real Queen Padme Amidala and not her loyal decoy this time). It turns out that all Anakin wanted was to know where the bathroom was.
A New Generation Edit
If Rabe was still alive and living on Naboo 32 years later, she was most likely killed along with everyone else on Naboo when Darth Vader ordered the planet's destruction from the Peace Moon's laser.