What do you get when you combine Castorama and Rice? That's right! You get Castorice.
Now, whether you're a fan of Castorice (from Honkai: Star Rail) or not doesn't matter, it's not a requirement to join. If you want to join just go ahead and send the request (unless we run out of slots lmao).
Rest assured, this is not getting disbanded any time soon (you know who you are)