I have a crack theory that the Seer was a shape shifting Blue. Blue is the one who planted the idea of a Curse in Rumple’s head. The Seer confirmed it and gave him a hefty shove in the direction of getting it done. The Seer has bright blue eyes, I swear I hear some of Keegan’s voice layered in there, and whenever she’s asked what other character she’d like to play, she always answers, “I love the smaller parts, like the Seer,” and it makes me wonder if her constant mention of that isn’t a hint that she actually was involved with the portrayal of that character.