[He doesn't have time to question Pyrrha's nervousness, as his attention is drawn to the other person in the room. Link does indeed catch a glimpse of the Devil Bringer, but doesn't reach for a weapon. Although he's startled, it's easy enough to assume this is Pyrrha friend or she wouldn't have been so calm about his presence.]

Oh... sorry about that! I didn't realize we had company.

[He quickly closes the sack of fish, then gets a better look at the stranger. Whatever that was on his arm Link can't see anymore, but he does take in the strange looking clothes.]

There's plenty of fish to share.