Sunshine Smiles

Sunshine Smiles is the placeholder name for one of the two unicorn pony sisters.

Depiction in the series
Sunshine Smiles first appears in Canterlot Boutique, alongside her sister, Moonlight Raven, as patrons of Canterlot Boutique. The excitable Sunshine Smiles is drawn toward "Tripping the Light", a dress inspired by Princess Celestia.

Sunshine Smiles and her sister, Moonlight Raven, appear again in The Cutie Re-Mark - Part 1 listening to Twilight Sparkle's Cutie Mark Magic lecture at the School for Gifted Unicorns.

In Spice Up Your Life, she and Moonlight Raven briefly appear outside one of the three-hoof-rated restaurants on Canterlot's Restaurant Row.

In Parental Guidance, she and Moonlight Raven appear in the crowd at the Wonderbolts showcase. In Honest Apple, they appear in the audience at Rarity's fashion show.

In Yakity-Sax, she and Moonlight Raven appear in the crowd at the Wonderbolts Derby. In The Washouts, both appear attending the Washouts' shows, though two Moonlights appear on different grandstands. In A Rockhoof and a Hard Place, Sunshine Smiles appears walking through Canterlot.

In The Beginning of the End - Part 2, Sunshine Smiles and Moonlight Raven appear as King Sombra's mind-controlled slaves.

Trivia

 * Sunshine Smiles is the fourth background pony to have a speaking role in Canterlot Boutique that was also her first appearance, following Cayenne, Pretzel, and Moonlight Raven.
 * She doesn't appear in Forever Filly and Fake It 'Til You Make It, which are the only episodes where Moonlight Raven appears solo.
 * Also, she appears without Moonlight Raven in A Rockhoof and a Hard Place, thus the only episode where former appears solo.
 * Sunshine Smiles is the fourth unicorn mare whose voice actor is Ashleigh Ball, and the second Canterlot mare to do so, following Upper Crust (Season 2). She is also the last unicorn to be so.
 * Sunshine Smiles is considered one of the most favorite Canterlot ponies, alongside her sister Moonlight Raven, Cayenne, Citrus Blush, North Point, Pretzel, and Sweet Biscuit.
 * She is the first pony who has that mane and tail style.