Although Felicity has cracked a few jokes this year on Arrow, she has also embraced the darkness with Oliver more than most members of Team Arrow.
When Thea Queen scolded her older brother for returning to killing, Felicity went in the opposite direction and embraced it with him.
Felicity has gotten in touch with her dark side in Season 5 of Arrow, and as Marc Guggenheim recently explained to EW: that evolution has brought her considerably closer to Oliver Queen’s mentality this year.
In all honesty, we probably should’ve seen this dark turn coming much sooner.