I've always wanted to ask, do we know what these really are about? Or better yet, do we know who exactly is behind that Himawari account along with those wiki edits? I am in the process of deciding how serious I want to look at these.
My strongest reason is that, like any other documented item, information should flow to wiki and get summarized there (and get agreed upon many as one extra QA step), and not the other way around where you can find information on the wiki that looks seemingly important but literally doesn't exist anywhere in the source materials.
I'd give passes to miscellaneous, trivial, and unimportant character facts like blood types. I can tolerate these information being mentioned only in wiki and never elsewhere, but not when the information has enough impact or is tied to the most mysterious figures in the game. Where did you learn this from even? If I can decide, the chance of Selly himself or someone endorsed by him doing these edits is so microscopic compared to the chance of a group of nitwits doing heavy RP and pulling everyone's leg.
Despite me saying that, I noticed I've given one pass to the Are You Happy Here Twitter account along with all the mumble jumble there, but only because that account just looks like a dev shitposting epicenter in which everything there is elusive as fuck anyway; it is not equivalent to finding stuff on the wiki that you can't even reference.