I really like that the outburst, argument and murder attempt has resulted in takahashi behaving more sincere with Itou. You can even see it in the kind of facial expressions she makes this chapter. There is less cheer, less gladness. It is a much more broad palette of emotions. She shows wearyness, contempt, she gets amused. Her monster-self, so to speak, is much more on the surface. (which makes sense, she knows Itou knows she plans to kill, so why even hide that now.)
Is it not an interesting development to take place that a relationship grows more sincere after one committed a murder attempt at the other?