It has to be Aayla Secura. I mean how could you not get distracted in the fight? Nobody could resist taking a peak at those blue boobs. And that's all she would need to cut you down, one quick glance and you're dead. They should have had her fight the Palpatine instead.
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Well, she died. That's proof enough that she ins't. The clones weren't distracted at all when they gunned her down. Tough question though. Revan is my bet.