I can't read Japanese and I used Google translate for the post text (so maybe there's more depth that's lost in translation), but the pictures look to be pretty "generic influencer". None of those pictures look any different than what you would expect from a random 20 something influencer. Additionally, the text on the tweet is pretty much "I like motorcycles" along with "her" age and height. Everything here seems to be pretty much the same "here's a pretty girl in front of something" post that instagram is full of.
Again, I'm only going off the pictures and Google translate, so if someone who understands the culture better wants to correct me, feel free, but until that happens, I'm going to believe there's nothing more to this than a bunch of people wanting to look at a pretty girl.
Edit: Ran the tweet in the article through DeepL at the suggestion of some replies. Here's the translation so you all can come to your own conclusions:
٩ Everyone!
Do you have a bike?
Spring will be here soon
Age: Showa era
Height:166
Lives in Ibaraki Kumamoto
I love to tinker with motorcycles
Comment: Life is once, play this world