Board Thread:Council of Arrowverse Wiki/@comment-9346948-20180216065020/@comment-1783334-20180225020443

I rewatched the episode with Purity and for now, I am willing to let Xander and Stryzzar have their way. With Purity claiming Julia is a mask, it would be tough for me to argue they are separate entities. However, it doesn't mean I will let this issue go out just yet. Once the rest of the season airs and if it shows Reign and Purity are clearly separate characters from Samantha and Julia respectively, then I'll bring up this point again. For now, the most accurate thing I can (from an objective point of view) say about Purity and Reign is that when their World Killer side awakens, their memories and mission come back. However, to maintain their disguise, their human side retains absolutely no memories of their World Killer activities when they let their human side take over because that's how they are programmed. The reason for this conclusion is when Samantha "black out", i.e. Reign took over, she was infuriated Lena told Ruby about her disappearances.

However, when the rest of the episodes air, I suspect they will find a way to purge the world-killer personalities and that will be the proof I need to argue two separate pages for each World Killer.