She is already subleader but you don't really see her being a subleader, perhaps its because of the closeness they all have, but at this point I haven't seen her being "subleader" like as much as I've seen her be purely her, I realize it shouldn't be anything special I guess, but I would still like to see her step forward and do something I could say "hey thats subleader like!"
I'm hoping that includes getting to talk more on one the shows they are on for performances.