One of her nerves were hit, painfully. Ever since that incident, Nensu took any relating comments quite personally. It wasn't very funny to joke around about it, especially if an individual making those said-comments happens to be her own father. The frost, which eventually turned into ice, was very sharp and very quick to conjure, and it covered at least half of her arm; from elbow to finger tip, it became a spear of ice in only a few seconds. Then, she felt and hear the protest from her green-haired companion, who just happened to appear in front of her, silencing telling her not to do something she might regret later on. In truth, it wasn't something she would feel bad about, afterwards. She was mentally telling Midoriya to step aside...before pausing. 
[i]'Wait, why am I even thinking of doing such things? Even with my quirk alone, I've never laid a bad hand on anyone before'[/i].
Nensu thought, as she looked at Midoriya, who stood between her and the flaming man. After this realization, it silently scared her; terrified to the point where she just might [i]become[/i] Loma. Nensu had always refrained from intentional violence, and this was the one time where she may need to self-check herself, because it just wasn't a part of who she was. She was caring, gentle, and empathetic; total opposites, compared to Loma. 
It took the female teen a minute to calm down, while she started using her left side to warm herself (since she was shivering).