I was looking at Suisei's wikipedia page. And it has listed her blood type.
I get that some fans really want to believe they are real and not just a 2d avatar. But I don't think 2d Suisei will ever need a blood transfusion.
>https://virtualyoutuber.fandom.com/wiki/Hoshimachi_SuiseiWhen is being delusional is too delusional?