On July 18, at the San Diego Comic-Con panel for Divergent Roth revealed that Allegiant is from both Tris and Four’s point of view. Talking about this, she said that "I tried repeatedly to write Allegiant in just Tris’s voice, but it didn’t work; her perspective, her way of seeing things, was a little too limited for the story I needed to tell, I wanted to do two things with it: A. let two characters experience different things, and B. let them react differently to the same things, so that I (and eventually, the reader) would get a better sense of the whole story, the whole picture.”
She further said that "I’ve said before that I’ve always seen Four (increasingly, as the series goes on) as a plot-mover alongside Tris, so he was the obvious choice for the second POV (though not the only one I tried). Exploring him and his choices and his assumptions about the world was incredibly interesting to me."
Veronica Roth said that she didn't try to choose titles ending with "-ent" for all three books. Furthermore, she said that "I did not go through other ideas. It was always [Allegiant]", which she defined as "One who is loyal or faithful to a particular cause or person."