ooc-charming-david:

I didn’t record this answer, so I can’t give you a direct quote, but to sum up:

You will always see Elsa in Emma’s magic. It was through working with and befriending her that Emma became more comfortable with, confident in, and capable of her magic. That’s why when Emma does magic, you will always see echoes of Elsa’s gestures and mannerisms. Elsa was a very important part of Emma’s life.

According to Jennifer Morrison today at Vancouver Fan Expo. (April 4th, 2015)

(bitterly regret I didn’t catch that answer on video)