[Even if he did stare, he wouldn't be able to see much. Maybe a brief glimpse of a mismatched pair of eyes behind the mask, one dark and vivid in the shadows while the right one is a damaged white that seems to switch from simply blind to something inhuman and seeing if one stares too much, or curt flash of teeth when he bares them in a smirk behind the mouth slit.]

Please don't mention it. I'm sure anybody else would have done the same. [minus the making Ruca pay for his 'saving' bit, most likely] It's a pleasure to meet you, Ruca-kun. I'm Nurarihyon. ...Though most only call me the Principal back home.

[He almost omitted the last bit, but there's still the off-chance that somebody else from home has also landed themselves here. If they did, "the Principal" would tell them a lot more than Douman's actual youkai name.]