Nensu watched as the green-haired teen tried to catch his breath, as well as her his thoughts together on the assault. For her, it was a rather disturbing scene, and it only made her more worried, especially since the man’s visit could be a sign that someone else, fitting his motive, could be nearby. Perhaps he had backup, hiding somewhere? Maybe he came alone? She didn’t know, and the notion to think of any possible answer, would only increase her fears. 
His answer may have confirmed her wonders on who he was, but it didn’t help their current situation, nor relieve her anxiety. He was the one who led the assault on the USJ: Shigaraki Tomura. She kept it in her mind, probably for the longest of time. 
Nensu couldn’t agree more, to get the police involved, and so, the girl called them immediately. She stayed close with Izuku, while they waited, to the point where she kept him close, and held his hand, the whole time. 

By the time they came, the whole mall was evacuated, but then, they found no trace of Shigaraki. The man seemed to have disappeared almost completely, as soon as he had appeared. They have managed to take the pair to the station, where Midoriya was interviewed about the encounter. The more they knew about this “leader”, the bigger the chance to find the entire faction itself. 
Nensu waited in the main room, where she noticed a woman with green hair and matching eyes enter the station, in what seemed to be a panic, or a meltdown. What struck the girl more, is the fact that this woman looked a lot like Izuku. “Excuse me? Are you Mrs. Midoriya?”, Nensu placed a gentle, comforting hand on the woman’s shoulder, hoping the contact would allow her to relax.