The library - still surprisingly well-stocked - in North Carolina’s Linden School, by the light of the setting sun.
The Snow Queen.
In an Alternate timeline, Elsa’s sister, Anna, did not survive the ice blast. A few years later, her parents were killed in a powerful storm.
The unfortunate events that transpired hardened her heart and made her hateful. She became a ruthless queen, enveloping her entire kingdom with endless snow.