The meeting between Yuuki and Zero was a total letdown for me. I was hoping for more of an emotional type of thing between the two, but rather, both Zero and Yuuki seemed rather detached from one another, not really acknowledging the present situation.
And the statement by Yuuki, "I will be Zero's ally" suggests that she does not have any romantic feelings for Zero, as of yet anyway. Its some proof that she still views him as a close friend and because of Zero's loneliness, sides with him right now. Not to mention they conveniently have a common enemy at the moment. But it does bring into question what exactly will happen if Zero were to confront Kaname and wants to kill him. It will be at that point in time when we find out where Yuuki's true allegiance lies.
And I really don't like the total personality change that Yuuki has undergone ever since she has awakened as a vampire. Before, she used to be an outspoken and "emotion on sleeve" type of person, which I adored. Now she's more mysterious, hiding her emotions, etc. I guess I have trouble taking a liking to it. But I guess realizing your true history and awakening as a vampire can have its effects on a person.
I'm still a little confused on all of the pure-blood vampires and exactly how they all relate to one another (probably b/c of me only reading the chapter once a month). Definitely a downside of monthly releases.