Stunned. Stunned was a good way to describe how Icarus felt just then. Stunned and a little afraid. He had never seen Esras look like that, never could have imagined it. Icarus, by nature, was not necessarily a pacifist, but he was much more bark than bite - always had been. It wasn't that he disapproved of violence but, quite frankly, it scared him. He had spent much of his life on the receiving end of it and to watch Esras seeing red like that was a lot for him to stomach.
But even worse than seeing Esras so aggressive was the way he seemed to unravel when he opened his mouth. It seemed directed at him in a way, like Esras knew that Icarus had been uncomfortable and was trying to justify himself. Icarus didn't know what to say or what he should do. He stood, white faced and staring for a moment, waiting for his sense to kick in and at least point him in a direction, any direction would have been fine. But as soon as Esras passed him on his way out the door and apologized, it happened.
It tore him to pieces to see all of these things from Esras that he never even thought to consider he had the capacity for. Icarus took a fleeting last look at the room and at Madison (at whom he shook his head), and rushed out after Esras, reaching out to grab him gently by the elbow as he reached him. "Don't apologize," was all he said. They all had to process this their own way and Icarus respected that. He may not have liked it, but he respected it. And more than that, he was more concerned at that moment about Esras than about any principle.