Every Arrow fan knows that Katie Cassidy is returning to the series for Season 6 as the dark and dangerous Black Siren. At the end of Season 5, she proved her loyalties lay with evil when she teamed up with Prometheus.
Presumably, she'll be a constant thorn in Oliver Queen's side this season. In spite of that, Oliver still sees something inside of her — or so says Arrow star Stephen Amell in an interview with TV Line:
"Oliver is, ironically, the most hopeful one despite the fact that she allied herself with Adrian Chase — who had offered to break her out of prison, so I understand where she’s coming from. But the fact is he’s sort of hopeful, 'If there’s a bit of Laurel in there, I want to find it.' He’s more empathetic to the struggles for [Quentin] Lance, you know, and anyone that has a history with Laurel. He knows that [Black Siren] is not a good person necessarily, but he hopeful that there’s something in there."
Oliver isn't ready to give up on the Laurel Lance he used to know. Even though this one is from a different Earth, she has all of Laurel's memories. To Oliver, that makes her worth saving — even if she feels "nothing" for him, Amell says.
But don't expect a redemption arc right away. Katie Cassidy says it's too much fun playing a villain:
"She's damaged goods, I think, deep down, and I think she's gone through a lot. She has a really dark past. A lot of these characters like Oliver and her father, they look like characters in her world . It's interesting now having her on Earth 1 and having her playing that out and seeing where she's going to go. But she's certainly fun. It's really fun to play a villain, I have to say that."
The damage from Black Siren's past has obviously shaped her, and overcoming pain and trauma can take a long time, a lot longer than one season. If anyone should know that, it's Oliver Queen, so he's going to have to be patient with her.
If there is an ounce of the Earth-1 Laurel Lance inside of Black Siren, she's buried deep. In the meantime, Oliver will try to make peace with the woman who looks like his ex-girlfriend — even if she's declaring war on him.
Arrow's Season 6 debuts Thursday, October 12th on The CW.