So this is Elsa. She’s got magical icicle powers and is a super badass:
BUT I SUBMIT TO YOU that the bottom gif is in fact Anna, not Elsa.
(Note Anna’s fringe and general face-shape)
(Also the similar design on Anna’s bodice, and her cloak)
(And last, but not least: it’s possible that it could just be a trick of the light, but Anna’s hair looks suspiciously white here)
This is Anna and she gets super awesome Icicle powers too!
Okay, I’m gonna have to correct you here, that girl IS Elsa.
The first gif is AFTER she runs away and becomes the snow queen.
The second gif is BEFORE, it’s her coronation outfit.
Anna gets white hair because of reasons you’ll understand when you see the movie.