"There's also a possibility that perhaps both the heroes will die ;-; That'll be the most saddest ending ever. But it's not impossible either. Especially when I read the sequence of VK character designs completion.
Yuuki was the first character designed by Matsuri Hino. That was expected. Can you guess who was the second character?
Not Kaname, not Zero but Aidou Hanabusa X3 Kaname was third, and then Zero was made right after him, because she wanted to make a contrast between those two.
My personal opinion over this sequence Yuki>>Aido>>Kaname>>Zero.
It is quite obvious that Kaname and Yuki are the final pair - Or at least Kaname will be the one in the her heart, although they may not be together at the end, perhaps.
I don´t see much sense in making the romantic pair of heroine in last place. It is into the unconscious to think in the couple when you're talking about a love story.
Zero was made to be Kaname´s rival, and he´s really is, this point is recognized by Kaname - he was on yuki´s heart too.But zero isn´t her real love. Or her big love.
And...why, why was Aido Hanabusa make after Yuki? He´ll be Yuki´s lover...HAHAHAHAHAHAH ok, no.
My fried said it and I liked ( but it´s sad):
Maybe, kaname and zero are going to die, really, in different circumstances. And Aido will stand by Yuki´s side, until the day she will fall asleep next to Kaname.
Maybe the ending will be that way. Therefore, Aido was designed after her, because he is the companion of the heroine.
What do you think about it?