User blog comment:Pochichi/Aikatsu Stars Presentation/@comment-27289874-20170308224737/@comment-30379300-20170308225502

Well Risa is Elza's singing voice, Kirara's singing voice still not decided yet, but most likely will be Miho.

I doubt Hime, Tsubasa and Yozora will disappear, since we know BANDAI always keep the character until the end like the original series, but maybe they won't too much appear in anime though.