Thea Queen (Willa Holland)Impulsive and immature, Thea Queen (Willa Holland) is the 18-year-old daughter of Moira Queen and the late Robert Queen and the younger sister of Oliver Queen. As a child, Thea idolized Oliver and was traumatized when he was presumed dead. Oliver gave her the nickname Speedy since she always used to chase after him when she was younger. She calls her brother Ollie.When both her father and her brother were presumed dead, Thea really struggled and fell into a life of drugs and partying to fill the void in her life. Oliver disapproves of her partying lifestyle and wants his sister to lead a better life. Despite her reckless behavior, Thea has a good heart and always tries to do the right thing. She is extremely loyal to her brother, to her friends and those she loves. But she often thinks with her heart not her head which often puts her in dangerous situations.