^^
I agree that would be a great idea, but I feel that erika is a far stronger singer than eri. Her performance in the ondo is really outstanding, in a way that rika was in ribon no kishi, I didn't know she had few lines in cute songs. I like eir's voice, but it's better in groups IMO. Or maybe she could do something like rainbow pinku.
the cw is ok I think. MM usually has quite good cws.
