Rachel Dare. She is kind of important to the story, but I honestly don't like her. She dated Percy before Annabeth and everyone could see that he was supposed to be with Annabeth and not Rachel (even though she was pretty awesome and threw a pink hair brush at the lord of the Titans...). I just didn't see where things could go with her besides her becoming the Oracle...and Percy ending up with Annabeth. That and I just wasn't too impressed with her to start with.