Opal wants to protest, because he's still not entirely sure why he of all people was sent to deliver the message, but it was still just a message delivery, and not anything all that sensitive in nature from the sound of it. But he will just let it pass with a small tilt of his head, an acknowledgement to Gustavain's point.

He does not shy away from the lean in, listening carefully to the warning with a small nod. "It cannot be as poor a welcome as any Wood would give," he says, and though the delivery is straight there is a small quirk of a smile- which may only make sense if Gustavain knows that Viera in their Wood tend to shoot first and ask questions later, "but I thank you for the warning." It is not necessarily needed, he is surrounded by pirates most days and you do not exactly let your guard down around them either, but the fact that Gustavain would seek to warn him is... reassuring.