Mystery Girl

"S"or the Mystery Girl is a character that first appeared in "Last One Out of Beach City".

Appearance
The Mystery Girl bears a close resemblance to   Rose Quartz, as pointed out by   Steven. Her hair is dyed pink. She uses eyeshadow, has three earings on her right ear, and has a mouth ring.

Pearl
Although not noticing Pearl at first at the Big Donut, the Mystery Girl catches up to Pearl, while the two are driving, and flashes her a smile. At the Mike Krol concert, she shakes Pearl's hand and discusses how she dyed her hair and, briefly,The Rebellion. Before leaving, she gives Pearl her phone number, indicating romantic interest.

Trivia

 * The Mystery Girl is considered a parallel to Rose Quartz by Pearl, due to her being both tall and having pink hair.