Nensu smiled softly at Iida, but the fierceness never left her eyes, just knowing that their class rep. would want to do something right, and follow his dream and purpose as the hero Ingenium. 
“Your brother believed in you, and he would want you to fight! You [i]are[/i] Ingenium; you have what it takes, you can do this!”
As long as she passed her words of encouragement, her attention wasn’t fully on their assailant, and a blade struck her shoulder; due to the speed of it being thrown, it caused her to gasp, stumble on the spot, and fall completely on the ground, momentarily blacking our from the Hero Killer’s attack. With that, her fires stopped, letting down one of their elemental defenses.