Reul Ghorm, better known as the Blue Fairy, is a supporting character on Once Upon a Time. She was the leader of the fairies in the fairytale world, and presumably the most powerful creature in all the land, capable of performing the most exquisite enchantments. She was responsible for indirectly instilling in Rumplestiltskin the idea of creating a curse that would transport everyone in her world to a different one, a curse that was later brought forth by the evil Queen Regina. In Storybrooke, the Blue Fairy's counterpart became the Mother Superior, the leader of the local nuns.

When Rumplestiltskin becomes corrupted by his newly gained magical abilities, his son, Baelfire, calls upon the Blue Fairy to help his father and the curse that has taken over him. Blueit takes to get Baelfire back. ("The Return")

Many years later, a depressed Jiminy makes a wish upon a star, and the Blue Fairy shows up. She tells him that it's not possible to bring back the boy's parents. Jiminy says that he has to make it right, but she tells him that there might be another way. She suggests that he help the young boy, who will grow up to face many challenges. Jiminy wants to, but he can't escape his parents. The fairy asks him what he'd like to be if he could be something else. He doesn't reply, only thinks about it, bathed by the sounds of the crickets, but she hears him loud and clear. She then turns him into a talking cricket, complete with