Due to their differing personalities, Felicity had a strained relationship with her mother. Both of them were members of a hacktivist group on campus, along with Cooper's roommate Myron Forest, as well as part of a cyber-goth subculture.
When she was 19, Felicity was ranked 2nd in the National Information Technology competition. Felicity, along with Cooper and Myron, developed a "super virus" which was originally meant for noble actions - digitally defacing criminals, exposing government fraud.
Cooper scolded Felicity telling her you'd only be a "hacker or a hero", though they later made up.
Cooper was then arrested by the FBI for his hack attempt and he went to prison.
Felicity tried to get him out by confessing she'd written the virus.
However, Cooper told her he'd already confessed, taking the fall for her.
When Cooper was about to sentenced, he hanged himself to Felicity's devastation.
Later on, Felicity dyed her hair blonde, changing her image leaving her hacktivist days behind her, saying "this is the new me." Felicity graduated from MIT with a master's degree in Cyber Security and Computer Sciences.Later on she moved to Starling City to work at Queen Consolidated. Upon introducing himself, Felicity accidentally mentioned his father's death, backtracking apologetically and ending up babbling at him, which amused Oliver.One night, Felicity entered the CEO's office and stared at the picture of Oliver and said he was cute. To her relief, he ignored her ramblings and gave her a bullet-ridden laptop, claiming that he'd spilled a latte on it, though she clearly did not believe Oliver's cover-story. Technologically gifted, especially in the field of computer science, Felicity is a member of Team Arrow, former CEO of Palmer Technologies, and the ex-fiancée of Oliver Queen. When she was very young her father abandoned her and her mother.Felicity met Oliver while working in the IT department at Queen Consolidated, when he asked her for many favors related to his vigilante activities. She reportedly lived in Las Vegas with her mother until she went to college.She discovered his secret and despite some reservations joined his team, coining the name "Team Arrow", and after many adventures the two fell in love. At a young age, Felicity became interested in computers, claiming to have been building them since she was 7. She had an incident with a stalker in her freshmen year.