Andrew Diggle

"Kill the green one!"

- Diggle tells the Ghosts to kill the Green Arrow, but spare his brother

Andrew Diggle is an antagonist in the fourth season of Arrow. He is the brother of John Diggle and was presumed deceased until it was found out that in reality he was alive and a soldier of H.I.V.E, serving as a member of the "Ghosts" elite force.

Presumed dead
During his military service he somehow became a warlord in Afghanistan, selling weapons, drugs and people. H.I.V.E. wanted to get into the market withoutn competition and thus hired the assassin Deadshot, who was beleived to have killed him. This led to his brother John becoming consumed by revenge and John tried to take down Deadshot for revenge. However, John also was able to find out that and organisation called H.I.V.E. was responsible for the death of his brother

When Damien Darhk and H.I.V.E. come to Star City, they clash many times with Team Arrow. During one of these fights, Andrew Diggle, clad in his H.I.V.E. armor manages to overpower his brother John but spares his life. John, unaware that his brother is alive, wonders why the unknown H.I.V.E. soldier fled instead of killing him.

Later, after a job well done, Darhk gives Captain Lance the H.I.V.E. file of Andrew Diggle after Lance asks about him. Lance gives the file to John, who to his horror finds out that his brother was a warlord in Afghanistan.

Truth revealed
However, while Team Arrow infiltrates a H.I.V.E. facility, they are attacked by Ghosts. During this fight, they manage to overpower Andrew and knock him out. To identify him, John removes the mask and is horrified to look into the face of his long-lost brother. Andrew uses the oppurtunity to flee.

John is shocked and hurt to find out what a man Andrew has become and tells Oliver that the brother he knew died long ago. However, Oliver is determined to not let go of this as he thinks there is more to it than they have found out. He plans to save Andrew from H.I.V.E.. Taking John with him, Oliver follows a lead by Captain Lance which leads them to the Star City Docks where Damien Darhk introduces new members to the Ghosts. Oliver and John are spotted and Andrew tells the Ghosts to "kill the green one", thereby ordering them to spare his brother. Oliver and John fight and escape.

After Ray Palmer has found out the location of H.I.V.E.s main base at Star City, Oliver assembles Team Arrow to infiltrate the base and save Andrew Diggle. John tells them to stop that as he thinks Andrew lost and does not want the team to risk their lifes for him, but they tell John that this is not his decision to make and head for the base. There, Thea encounters Andrew and fights him, eventually overpowering him and knocking him out with a tranquilizer arrow. After a brief occurence with Damien Darhk the team manages to get Andrew out and imprison him in their hideout. There, John faces his brother, telling him that he does not even know where to start. He hands him the H.I.V.E. file he got from Lance and asks Andrew if what stands inside is true. Andrew takes the file. After briefly looking over it he coldly exclaims that everything inside is true, throws the file in front of John's feet and turns his back to his younger brother, who leaves the room in tears.