Unlisted Clip uploading
I don't think she was doxxing Advent at all.
> someone who was pressured to get 10k subscribers within 3 days
I don't think this fits anyone from Advent at all? GGN twins were forced to graduate but nothing as specific as subcount was mentioned. As for who could it be, I actually do have someone in mind, Amemiya Kiki. She was indeed pressured to get 10k subs, except it most definitely wasn't within 3 days. Heard she was also a good singer which fits Shiori's description.
> someone who promotes tourism
Could also be Kimino Miya, who was bilingual and promotes tourism.
> someone who promotes water
She mentioned about cultural barrier so it was definitely not Bijou. It could be Suntory Nomu who works for Suntory, a beverage company. Also a good singer which fits Shiori's description.