Unlike the Prompto trailer that was pretty obvious when and where it took place, I'm stumped with this one. It can't be post Leviathan battle since he has his sight or during it since it's not the right setting. I also can't remember a time that he was separated from the group like Gladio was before Altissia.

I was honestly hoping for his episode to take place during the World of Ruin to showcase a bit more of that setting as well as him adapting to his impairment.