Blue Fairy is a manipulative individual, and I trust her about as much as I would trust Rumpelstiltskin. It’s weird, but she herself has been intertwinded with as many lives as Rumpelstiltskin. She turned Jiminy into a cricket, in return, asked him to guide Geppetto in his life. And, she seemed to have a hand in giving Geppetto the wood to carve Pinocchio out of, and she was the one that turned Pinocchio into a real boy.