In contrast to what she assumed, Emperor Namus was quite composed while talking to her and this made Eloria a bit baffled. As Andry and Vicus said, she went there, prepared to deal with the rage of the Emperor who was known to be fiercely protective of his youngest son.
Did the Emperor understand the situation? Or... did he hold back because it was her?
Maybe the Emperor knew about her as the Empress did.
"I come here personally because I think it's the right thing to do," she finally responded to the Emperor after maintaining her silence for a while. "Instead of returning to Aritish like a coward, I wanted to come here and listen to whatever you have to say. It's not about fear, Your Majesty; it's a sense of guilt and responsibility."