Haha Kuroki is usually lazy, but when she is told or ordered to do something she does it pretty well!
I like Asuka very much. She is like the commanding officer in a battalion, telling her subordinates do their duties.
You're right. I actually love Ogino. She's tactless sometimes but she really cares about her students and feels responsible for anything she can do. And you're right, she has helped Tomoko immeasurably despite mortifying her on occasion.