She found Anna in the attic space above her bedroom, where Elsa was surprised by Anna springing out of a box where she was looking for family traditions.
Elsa recognized the symbols in the diamonds as elemental signs, before they all collapsed to the ground after the appearance of a large symbol in the sky.
Immediately regretting losing control of her temper, Elsa slowly realized she had nearly hurt the party-goers and left the room, hoping to find temporary solace in the courtyard.
Though Elsa tried to flee from him, the prince told her she could not escape the circumstances.