Slater

Slater (died 2015) was a member of H.I.V.E.

Biography
Slater was the only ghost that accompanied Damien Darhk on his mission to blow up a train headed from Central City to Star City.

During the mission Team Arrow attempted to to H.I.V.E.'s plan. After the Green Arrow jumped on top of the train Slater noticed this and went to investigate. When he opened the train's door he was grabbed and thrown out of the train by the Green Arrow.

Season 4

 * "Green Arrow"

Trivia

 * Slater was Oliver Queen's first kill as the Green Arrow.