Unexpected! I keep thinking that Akane will join Ruby's group in the future. Instead, we get this youtuber. It's the most logical outcome after all. Net idol is a thing!
Oh all the people we were thinking might join Ruby's group, it's Mem-cho in the end. But it does make sense, in a way, since we haven't seen much of her yet and that means there's a lot of space for consequent development.