Glen considered how to meet the younger woman's challenge to speak out, a hesitation that let the others beat him to the punch initially. But it was quite clear she was uninterested in anyone who wasn't willing to keep up with her snide remarks. So giving some sort of response was almost certainly expected if she decided to directly address a topic.
She went on with more leading questions, of course, but the other speakers gave him a chance to think about how to respond...
And then Grain reminded him and probably everyone else that nobody had really introduced themselves. And she had quite the point with that one, since they were apparently being dragged right on out to the field at Arinne's convenience. If nothing else it would be prudent to know who could do what here.
"So skilled, not talented, for sure? Then surely they know the Tower would involve itself in a matter like this, since we know they're not stupid. They didn't even bother hiding that the killings were done with magic. The women just disappearing wouldn't bring magi in, so whatever it is they want, they do want magi pursuing them, investigating this. Did you at any point consider that, Lady Ar-Rynesarte? Is that the conclusion you've been looking for then? And of course despite that you want to walk right in to whatever they're doing."
Having dealt with that, he turned his attention towards the residents of the room other than Arinne. "It is fine enough to meet you, Blackmore. I might as well make my own talents known. I'm Glen...Pearwoolf. My family's affinity is dreams, which is why I understand how dangerous it is to go assuming what it is this murderer wants."