User blog comment:Eobard95/Is Artemis the half-sister of Prometheus?/@comment-24152851-20170406092838/@comment-24152851-20170409115825

@Eobard. Well call me uncreative, but I don't see how they could lie their way out of "Vigilante's identity will not be revealed this season" unless they reveal his "fake" identity this time round or something. But that doesn't fit with "Adrian took up two identities to menace Oliver on two fronts", because what Vigilante does is immensely anti-productive to what Prometheus is doing. Vigilante actively tries to kill Green Arrow and Oliver Queen, while Prometheus has gone to great lengths to keep others from killing him. Church got a throwing star in his neck for going near Oliver. If he really did have the split-personality thing, you'd think someone as smart as Prometheus would have done something to restrain his other side by now. Plus, isn't he a little busy to be doing both his master plans to break Oliver, as well as gun down random criminals? With Hunter, it was implied several times that "Jay" is not what he seems. Plus, training Barry to get faster was exactly what Zoom wanted, like Xandermcc said.

I guess, that could work? But I'm fairly certain that Evelyn did not initially join Prometheus due to him being her brother. She joined simply because she's a bitch who wants Oliver to fall, for very petty reasons.