User blog comment:Tachikaze Master/How to waifu war: Formally/@comment-27565452-20160210082637/@comment-27565452-20160210192945

Tachi says "The parallel world version that would have seperated a long time ago would have had different experiences than the self in the other one, therefore personality and attitude and stuff will change."

As you mentioned, they would have changes due to their different experiences (which is a snowball effect due to divergence in time) and is especially true when its after a long time cause of the Butterfly Effect.

But lets say I set the Point of Divergence where the instant after Iona made a decision, she immediately met me or Drew. In this case, the only changes in her experience would solely be affected by me or Drew, thus the Iona we met would have still been exactly the same, and will only have differences caused by either of us.