I just realized something about Fi.
She's a cross between Navi and C3PO. Not only does she annoy the shit out of you, but she tells you the probability all the damn time. You get a damn key, she'll probably say it's 95% probability it'll unlock that door two feet away from you. I guess C3PO gave everyone the odds of someone surviving or whatever, but it's the same idea...UGH
http://www.vgcats.com/comics/?strip_id=42
They need to make one for Fi now.