Emiko is the daughter of Robert Queen and Shado, but was raised by Simon Lacroix, also known as Komodo, after he kidnapped her from Shado when Emiko was still a baby. After a lifetime of training with the Outsiders, Emiko first saw combat when she came to Komodo's aid during his second fight with Green Arrow, managing to stick two arrows in him.
Green Arrow initially assumed that Emiko was Komodo's daughter, but learned the truth about her parentage when he rescued Shado from the fortress of Count Vertigo. She admitted to being Emiko's mother, but also revealed that Emiko was Oliver's half-sister.
First Appearance: Green Arrow #18 - The Kill Machine, Part 2