I have to say, I'm really falling in love with Sayumi now. She is such a great leader. I love her comedic timing and sense of humour - like apologizing to Reina once Reina says "finally, someone who can sing!" (about Sakura's 11th gen addition). And apparently she was in a way defending current Morning Musume when some ex-members said that in the old days, the gaps between different generations used to be wider, Sayu commenting that the current way has its own charm. (Note: This is what I picked up from translations in IRC and I may remember some details wrong. If anyone has access to such translations in detail, I'd love to see them posted >_<)
At 23, Sayu's intellect, hard work and kindness are making her VERY attractive to me...