Sunset Shimmer

''"Yes, Sunny, the sun has set.  But there is beauty in the night just as there is in you, me, and our friendship." ''- Goldie to Sunset Shimmer after the latter's defeat

Sunset Shimmer is a female Unicorn. She was formerly a Field Golden Retriever, and was also once a student of Princess Celestia. She is the main antagonist of Equestria Girls, and in the film, is shown as a human.

Depiction in My Little Pony: Equestria Girls
Sunset Shimmer appears in Equestria Girls as the main antagonist. She steals Twilight Sparkle's crown, and with that, Twilight and Spike follow her into the human world where Sunset has been living in for some time. Sunset eventually is beaten by Twilight and company, and seeks forgiveness in those that she has hurt.

Depiction in Equestria Girls: Rainbow Rocks
Sunset Shimmer's reformed self in Rainbow Rocks is very similar to her Goldieverse counterpart's true nature. She admits to her previous mistakes and is "always looking out for what's best for the Rainbooms", as said by the official Equestria Girls website.

Personality in the Goldieverse
Sunset Shimmer is first introduced as a villain of the Goldieverse's official Equestria Girls. She acts very much like her MLPEG counterpart, only with a very slight streak of appreciation for Goldie and a little bit more into sarcasm and dark humor (much like Goldie). She is stated to be a close puppyhood friend of Goldie, but eventually persued her own path due to a fight between the two.