Kael looked towards those individuals who were not going to be guarding the entrance and nodded his head at them, calculating their strengths that he knew about and the chances of annihilation. He scratched his head as he thought what could be out there. There were a infinite amount of Grimm that could be there, hiding themselves inside the ruins, but they needed to take a chance. 

Turning to the small group now, Kael saw that Schwarz was coming back from her scouting mission when the one-armed girl, Ravira, he remembered from the initiations, suggested that they retreat. Kael's face turned into a snarl at the thought as he did not run away. But, the math did not lie about their chances of survival. The best thing to do would be to contact the school and have the area bombarded before moving in to examine the area. However, by the time the school arrived, the Grimm could've moved on. He rubbed his chin, weighing the risks. 

"I believe the best thing to do is to send a message to the school with our coordinates and a request for reinforcements. This is a hive, a place where the Grimm can grow immensely stronger before they invade the innocent cities around. We do need to at least check the nearby area to ensure that the perimeter is safe."