Thea Queen

"Ollie, I love you, but you can't come back here and judge me, especially for being just like you."

- Thea to Oliver Queen

Thea Queen (born 1995) is the sister of Oliver Queen, and daughter of Moira and the late Robert Queen.

History
Thea (it is insinuated) idolized Oliver as a child. They used to be close and, according to Oliver, she used to chase after him when she was younger; that's why he gave her the nickname "Speedy". When her father and brother were both presumed dead, Thea felt alone — disconnected from the world. She fell into a life of drugs and partying presumably to fill the void left by her father and brother.

Trivia
In "Pilot", Oliver uses her apparent old nickname, "Speedy", a reference to Green Arrow's sidekick in the comics who also happened to have a drug problem.

The character "Thea" is not specifically found in the comic books. She is however based on a composite of Roy Harper and Mia Dearden; characters from the comic books who both take on the identity of Speedy.