Board Thread:The Flash discussions/@comment-9346948-20180523070317/@comment-24152851-20180528005248

Ninja72 wrote:

But Thea is not an actual character from the comics, she is just based on. Seriously? "Based on" means they are from the comics.

She got renamed but it's made clear she's the same character. She's the Arrow version of Mia Dearden/Speedy. The show may have made her related to Oliver but it's still her.