Rolf's mind was slowly unfogging, not fast enough that he'd have a quick response, but still enough that he was able to realize his mistake.
"Uh... right," he said. "Won't you come in?" he added, even though he knew it was a little bit too late for that.
He shook his head, making a mental note to talk to Cho about his tea blend again. He needed to get back into his old routine if he was to stay at the village, and that apparently included not greeting massive strangers while looking and acting like an inferus.
"I'm the marine biologist," he said. Then, remembering that this man was supposed to be a Viking and therefore probably not familiar with the term, he added, "I mean, I study and tend for animals living in the water. Won't you take a seat?" he added politely.