Emily first introduced herself to Sydney in season 5, as being friends with "the dead girl who isn't dead anymore."
She assumed Sydney was staring at her because of Alison's dramatic reappearance!
Turns out Sydney was much more interested in Emily's trophies as she was a new member of Rosewood's swim team.
Emily and Paige hung out with Sydney and helped her perfect her swimming performance.
The trio even shared silly stories over pizza.
And it seemed like a beautiful new friendship had begun!
Paige made her feelings about Alison's return to school very clear to Sydney.
Everyone was terrified about ending up back on the queen bee's hit list.
Unbeknownst to Emily, Sydney soon became friends with Jenna and Mona, who were determined to take Alison down!
A super brave move for someone so new to school.
Hanna drunkenly let slip that she and the other Liars had been in New York when talking to Sydney about Jenna and Shana.
The girls then got a text from A later that night...
Emily came face to face with Jenna and Sydney at the optometrist's office.
These two actually went waaaaaay back as Sydney used to volunteer at the school for the visually impaired that Jenna attended.
It looked like Sydney had switched sides once again when she became a member of Alison's entourage at the Ice Ball.
Would anyone ever trust her again?
But Jenna was in on the plan too!
Sydney and Jenna told Emily that they were doing what they had to in order to survive.
We didn't hear anything more from Sydney... until she returned in the shocking summer finale!
What have Jenna and Sydney been planning all these years?!
Do you think Sydney's return is for a noble reason, or do you think she's scheming something?
Who else would you love to see return to Rosewood?
Let us know below.