SPOILER WARNING: This article contains major spoilers for "Doppelganger," the latest episode of Arrow.
Earth-2's Laurel Lance, aka Black Siren, has chosen a side in the war for Star City. In "Doppelganger," the latest episode of Arrow, Black Siren revealed her allegiance to Ricardo "The Dragon" Diaz.
At the end of last week's episode, Black Siren "outed" herself to the public and pretended to be Earth-1's Laurel, who died in Season 4. Naturally, "Doppelganger" dealt with the fallout of that decision. Black Siren thrust herself into both Oliver and Quentin Lance's arms in front of the press, forcing them to accept her into their group -- or else she would out Oliver and the rest of Team Arrow to the public.
As Black Siren transitioned into her new life as Earth-1 Laurel Lance, she involuntarily met up with Diaz. He demanded the money that Cayden James embezzled from the city and informed her that their work together wasn't done. So saying, he let her return to Quentin's apartment.
When she returned, she informed Oliver, Dinah and Quentin about Diaz's whereabouts. According to her, she was pretending to be Laurel Lance; she might as well start acting like her. With this information, Team Arrow was able to track down and save Roy, although Diaz was ultimately able to escape.
As the episode drew to a close, Oliver swung by Quentin's apartment. When Black Siren opened the door, he thanked her for her help. She responded to say that she only wanted time to prove she could change for them. He told her that was fair and left. As she closed the door, she glanced at her phone, only to find a text from Diaz that read, "Good work." The sight of it made her smile.
Considering Diaz's text, it appears as though Black Siren has sided with Diaz. After all, it implies that everything went according to Diaz's plan and confirms that she is still in contact with him. However, unlike many of Arrow's villains, Laurel is an self-motivated opportunist; she will seize any moment that best benefits her, regardless of who she's helping. It's possible, then, that she could dump Diaz the moment a better opportunity comes along.
Starring Stephen Amell as the Emerald Archer, Arrow airs Thursdays at 9pm ET/PT on The CW. The series also stars Emily Bett Rickards, David Ramsey, Willa Holland and more.