@bk3k if i see his personality he just doenst care the impostor, the impostor doesnt even did a misconduct or harming the citizen, and he saved them from the apparition. so far why not just use him for the symbols.
and the mc doesnt want to stand in the spotlight tho. about curiosity im sure he is know him perchance or he just wait for the best time to seek the impostor identity
i think the pace is a bit fast here... impostor making the jailbreaker a place for meet, the hero association plan for capturing the impostor, another jailbreak by the real zero enemy (nemesis?), and he attacking hero association.. well just my opinion tho