Asher, Scarlet, and Cecil just watched the whole scene with their own respective feelings and expressions.
Asher felt nothing but disdain and contempt towards Rick, as he understood that there was no place for someone like him in this world and that his presence alone would do more harm than good.
Meanwhile, Scarlet and Cecil were angry with him for what he had done to them and were glad that he was being punished for his sins.
Every person at the scene was focused on the current events unfolding and kept their attention fixed on Rias, as the person who committed the crime was the grandson of the Grand Elder, and punishing him with a death sentence would be a big issue.
Thus, it was natural for everyone to be curious about what she was about to do to him and whether or not she'd really execute him on the spot.