- (To Chigusa) "Nanase Haruka. Tachibana Makoto. Hazuki Nagisa. What they have in common is that they used to belong to the same swimming club. And they're all boys with girlish names."
- (To Nagisa) "Don't call me Gou. Everybody calls me Kou."
- (To Nagisa) "The typical reading is Kou, so call me that. That would be the nice thing to do."
- "No! Don't look! Girls my age shouldn't ogle naked men! Must... not... look... What... incredible triceps!"
- (To Makoto) "You still need one more member, right? (...) Please let me join! You're the only ones who can change my brother. If you're willing to have me, I can serve as your manager and help you out!"
- (To Nagisa) "You're supposed to call me Kou!"
- (About Rei) "Look at those deltoids..."
- (About her notes) "Many things can't be expressed through notes. Muscles are best in the flesh! All of these muscles simultaneously in one place! Wonderful! Marvelous!"