Unpopular opinion:
I used to dislike Chisato. I was worried she would be vain and the way she talked to Kaoru really irked me. But, I re-read PasuPare's band stories. I came to understood her character. I came to understood why she acts the way she does, even with Kao-chan Kaoru. Then, I admired her beauty and her excellent voice, courtesy of the glorious Sumippe.
Now she's my fourth favorite girl and I want worship her as much as Kaoru does. She is a queen.