“-You said you had a rough summary by the time you really started the project. Was Kurisu
the main heroine at this point in time?
-We had decided that Mayuri would die
over and over again from worldline convergence, and there was the
absolute goal of saving her. So at that stage, Mayuri was the heroine
no matter how you looked at it.
But in creating the narrative flow that would
lead to that point, Kurisu started to intervene. Even among the
labmems, Kurisu is the one who has a viewpoint closest to Okabe’s.
For example, even something that Mayuri or Daru wouldn’t believe,
Kurisu will. In a way, to Okabe, Kurisu is unique in the world. In the process of digging into that aspect, Kurisu quite automatically became the main heroine.”
-Interview with Chiyomaru Shikura from the official S;G guidebook