When asked to explain and carry out the essence of the role, by Hiroko Izuka, Kyoko was left speechless.  Although Ren follows Kyoko to put her at ease, Kyoko still wasn't able get a hold of the role.  Facing the adversity of getting into character, all of a sudden, she notices what is missing from her performance.  Kyoko returns back and carries out an amazing transformation in character.
It's like I'm trying to find flaws in the original Mio.