Beleth is very tempted to be offended, and her back straightens as she tries not to look tetchy about this guy acting like she has no idea what she's talking about. No, she can control her emotions. He's not the first person to talk down to her -- it briefly occurs to her that he would be the last, if she ever got to get home. Solas never did it.

"I have faced and killed many demons, and a dozen different types. I will admit to you that I have not yet seen a Chaos demon specifically, I've fought demons of rage, despair, desire, fear and pride. I'm at a disadvantage here, but I am capable." It is said softly, calmly, but with a surety in her voice. "I have been approached many times in my own world, and each time, I slew them."