Rise will be stuck outside so she can fill the communications role like Kanami will for those inside! Her power is pretty much exactly the same since she had it first... she can only communicate with people she knows who will let the 'signal' in, and she can connect up to three people besides herself!

Since poor Kanami is new to this power, it seems Rise will be trying to help her get a handle on it as well as keeping in touch with her friends inside. (Sorry Sonico and possibly Cirno, she'll keep you updated so you don't worry too much!)