It gives you additional characters on some of the levels.
Example: General Grievous gives you a buzz droid.
Dagobah gives you a skeleton.
Cloud City Trap gives you Han Solo in carbonite and so on.
Chat with our AI personalities
It let's You Use extra charcaters on certain levels
no she is not on Lego Star Wars the complete saga
Nothing. Not that I can tell. I had a similar question. After a while of looking online and a bit of experimenting myself, I found nothing. I know that in LEGO Star Wars I-III and LEGO Indiana Jones it let you play as bonus characters in Free-Play mode. I knew for LEGO Batman It had to be different, as I tried multiple levels with empty hands. I was a bit frustrated while looking online, as many people who had never picked the game up but had experience with other LEGO games explained it unlocked bonus characters for Free-Play. It does nothing.
EVILR2
sorry to say this but you can't