Big secrets are about to be revealed on Arrow!

In fact, one is coming just this week as Oliver learns the identity of that mysterious other Green Arrow, who viewers learned in the last new non-crossover episode is none other than his secret half-sister, Emiko (Sea Shimooka), the daughter of Oliver's (Stephen Amell) late father Robert and a still unknown mother. She gets her chance to shine in tonight's episode, which was only recently revealed to be titled "My Name Is Emiko Queen."

"It focuses on her and we have a cool, fun, opening montage of her kicking ass, and it's really told from her perspective," showrunner Beth Schwartz tells E! News. "We get to find out what her mission is and sort of why she's around and what happened to her family, and more about Robert kind of not doing right by her."

No one on Team Arrow knows her identity yet, but they will tonight, and you can bet Oliver's going to be surprised to find out he's got another sister.