User blog comment:Eobard95/Is Artemis the half-sister of Prometheus?/@comment-24152851-20170406092838/@comment-24152851-20170406102731

I meant Evelyn being petty. She was a pretty extreme vigilante wanting to get revenge on her loved ones. The implication was she sided with Prometheus because she doubted Oliver's methods. Maybe staged, but there's one thing that doesn't add up to that theory. Evelyn didn't make any guaranteed means of drawing in Oliver. She didn't call for help, but instead shut off her com with Felicity. Oliver might have showed up, but he also might not have. Although I think she first allied with Prometheus while on the train, in some unseen bit before Oliver arrived.

Oh, that's actually a good point. The arm cutting did feel out of place and Prometheus shouldn't have been that easy. Okay, you may be right in that the fight was staged and she had allied with Prometheus at that point, but it isn't necessarily because they're related.

Possible I guess, but a lot of really big "what ifs" there. The only evidence in favor of that theory is the whole Prometheus being Adrian Chase thing, even though we know he's not really Adrian Chase now. Well considering Vigilante has only appeared three times, there haven't been much chances for them to appear together. I'm still not quite convinced about that. Their fighting styles are so different with Prometheus evidently being far more competent than Vigilante, as well as the fact Vigilante doesn't seem to use a voice changer and his voice being different to Adrian's.