I could easily list just as many traits for Ginko as you have for Yuuno, and I'm not even much of a fan of her character. I don't really see what you mean, though.
Yuuno hasn't shown to be honest - if anything, the normal schoolgirl persona she sticks too is her being dishonest with herself.
Hard working? It's Japan, who isn't? But honestly, I can't think of anyone who has shown this trait any less than Yuuno besides Murasaki and the apartment girls. If you can, feel free to point it out.
And her caring for Shinkurou is implied, but it hasn't been shown yet either. She does well when he needs her to help him train, but she never actually tried to find out what was going on despite him clearly having something to hide.