Midoriya ducked and rolled away when a stream of fire hit where he was standing a moment ago. He was too confused to show any reactions than stay still again. Then, he realized that the shot was not a joke- it was evidently meant to harm him. He lowered his stance and swallowed. Whatever was happening didn't seem to be good.
"Wh.. who are you?!"

Hiems stopped for a moment when he heard the sound of a stream of fire being launched at whatever target Nensu found. He looked behind and saw nothing. So if it wasn't him, who could it be? He followed the sound once again, this time much more carefully and slowly so that he wouldn't bump into the duo out of a corner and get taken out by surprise.