LOL, in a weird sense I agree with you, Aidou is very clever, can see behind labels and positions and acts accordingly. But the funny part is also Kaname does not push him to treat Yuuki any better like in chapter with the punishment for opening the door, Aidou goes "Idiot" to Yuuki and Kaname says nothing about it, so I think that he supports in a way Aidou's-Yuuki intimate relationship and on the other hand Aidou is not afraid to express his opinion for Yuuki's actions even if Kaname is present. And that shows that Aidou's intention are true, they are not based on just respect or duty, he is really interested in helping Yuuki with her new role.
Hm, i agree with you. Well, i think that Hanabusa might had a little crush on Yuki, but the part which worries me is that even if Hanabusa likes Yuki, he will step back for Kaname's face and the romance between Yuki and Hanabusa won't even start.
I do believe that Hanabusa really cares for her, may be because he knows that she is stupid or may be because she is Kaname's lover.
It would be nice to see them together. If Kaname didn't exist, i would be up for Aidou and Yuki.