All 3 of those eps have significant Cora appearances. Curious.
Cora does have this doll to her side when she appears before Rumple when she asks for a truce in 2×12 “In the Name of the Brother.” I’m leaning in the direction of it having some significance for Cora and Regina.
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Custodian of Graham's darts, Rumple's spindle and Robin's quiver