eh.. not a great fan of unique skills. Would've been fine with just a basic skill.
Would've made a good joke, too. Lady Karin bragging about her special skill, everyone speculating about what insane nonsense she'll do, Lady Karin pulls out needle and thread : )
So I think Kitsunehara Konkon is the nerdfriend who told them about the stream.
On the surface, that idea should be absurd - he wasn't there, so he shouldn't know what happened.
Except, he did - how else was he able to tell that the stream was about Airi?
After telling Airi about the stream, he...
According to Shiori, depression(technically suicidal urges) makes you "smell like a dead whale", so.. no.
Note that Hinako is both able to smell out monsters and can see monster blood and it becomes obvious she's had som kind of spiritual awakening, which is presumably why she's yummy.
No idea...