Nanashi raises an eyebrow at the mention of Naraku.
Also that the young man seems to know a bit about other languages.
This means that both his eyebrows are raised, which is to say he looks quite surprised with these developments.
Still, the woman seems to shun interaction, so this youth was to be his only source for information.
"Spider? Was it?" Nanashi says with a vaguely something accent. basing his assessment on purely observational data (judging a book by its cover, as it were) He doesn't keep too strict to business protocol as he continues, in a relaxed tone. "I don't know whether I believe this or not, I'm rather skeptical and believe that I may have been poisoned. By your mentioning of the internet earlier, I presume that we were in very different circumstances when we were abducted.
My name is Nanashi Sekka, You can call me Shisa or Simon if either is more convenient. I live in York.
I'd like to figure out what is going on here, but this woman doesn't seem to wish to talk much. Can you tell me if you experienced anything unusual before awakening here?"