I think Chihaya will end up with Arata in the end. In most of the shows that I've seen the girl ends up with the guy that changed her life for the better. People need to realize Chihaya isn't just playing this game because she loves it, shes playing it to get closer to Arata. People think that just because Taichi was there for her that automatically means that they should date, he's her friend, and that's what friends are supposed to do. Also just think, if Arata didn't have to leave to take care of his grandfather he would be doing the exact same thing Taichi is doing. But honestly I love the Chihaya that loves Arata, the moment she stops loving Arata is the moment she stops loving the game and that's something I don't want to see happen :). He is the motivation that pushes her forward.