Storybrooke character: Mother Superior
Fairytale Land character: Blue Fairy
Fairytale origin based on: Pinocchio
The Blue Fairy was a force for good in Fairytale Land, and pops up now and then to help our heroes, especially when they wish on a star. Of particular note, she once gave Rumplestiltskin's son, Baelfire, a magic bean that would allow him to take his father to a world without magic, where he could be free from the Dark One's curse. When Rumplestiltskin refused to go through with it and lost Bae to the other world, he blamed the Blue Fairy; she also accidentally gave him the idea for the curse that takes everyone to Storybrooke.
In Storybrooke, Mother Superior is the head nun at the church. She is strict, and has a tense relationship with Mr. Gold.