From watching Hello Days with C-ute, I realized Maimai has trouble talking o_o There was a scene backstage where she was trying to say something, and Meguru was laughing and correcting her because it seemed she was saying it wrong. Then at some other time she was on stage and when it was her time to introduce herself, she said something wrong again and had to correct herself twice or something.
I wonder what's wrong with her ^^;;; I wouldn't really blame everything on her age. She's lucky it's cute, but I'd imagine it gets frustrating to herself as well if someone's always correcting her speech.