For the sake of it, it could also be Henry, Snow, Charming, or Aurora that has a connection to Hades. If we are correct that the “Red room” is connected to the underworld, perhaps someone actually met the guy and kept hush hush about it. They were all under the sleeping curse and that fiery room can be described as hellish.
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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