If you were talking about the Outers...
Haruka and Michiru: They would be running a page for LGBTQ Japanese and would keep up with news about issues that mattered, like marriage equality. Of course, they would run it under anonymity.
(ICYWW, Taiwan became the first country in Asia to reach marriage equality a few days ago from this writing. I too am aware of the LGBTQ issue of Japanese marriage equality. I watched NHK World Japan so I tried grounding the concept in some reality connected to their reality.)
Setsuna: Probably working as a designer for various companies designing products, so she would have a good portfolio web site for products.
Hotaru: Probably as a doll and lamp collector, so she probably would have a PayPal and an eBay account and an account for a site on supernatural occurrences that happened in their world, mainly because she has a propensity to allow her to be in a situation where supernatural power takes hold.