This seems to be about Oz. Munchkinland is a very blue themed place in the books, and the farm girl may be Dorothy.
Also the thing about them hiding her may refer to the same situation Zelena went to confront them on. But hmmm… this “leader” is quite clearly the villain, and an obvious murderer. So..not Zelena? And he has magic… Hmm… The Gnome King perhaps?
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"I could have the giant duck as my steed!" --Daniel Radcliffe
Keeper Of Tamara's Taser , Jafar's Staff, Kitsis’s Glasses , Ariel’s Tail, Dopey's Hat , Peter Pan’s Shadow, Outfit, & Pied Cloak,Red Queen's Castle, White Rabbit's Power To World Hop, Zelena's BroomStick, & ALL MAGIC