Well, I'm pretty sure there's just one... it made it kinda obvious in the 日本动漫 that Zero was Yuuki's "Knight," although a lot of the other characters are 吸血鬼 as well as being quite chivalrous, so there could be any number of "Vampire Knights," actually..
Okay could 你 maybe make the 问题 a little clearer. What are 你 asking is it How many 日本漫画 volumes are there? so far there are 13 published in english How many episodes in the 日本动漫 series? there are 13 in both season 1 and 2 who is the vampire knight? well it hasn't been official who the Vampire Knight is but i think it's really obvious it's Zero.
there are 2 knights on one side of a chess board, but i would say that in Kaname's mind, on his side their is one Knight, Zero Kiryu, and many pawns like Shiki 或者 Rima. but if their were 2 knights, i would say the other knight would be Hanabusa Aido, because in the latest chapters of vampire knight, Aido-sama stays to protect Yuuki while Kaname is away and Zero is her enemy. they become closs friends. 哈哈
There are two seasons, Vampire Knight and Vampire Knight Guilty. There is ONE vampire Knight though, and that would be Zero. He is a (-SPOILER-)Vampire, Vampire Hunter and a Knight in Yuki's eyes. :) Hope this helped ~Razzi
你 mean seasons? Two. Vampre knight and Vampire knight Guilty. But I guess Zero is Yuki's 'knight', in a sense. He is both Yuki's saviour, and the person he (I assume) has all intentions of killing someday. His job, after all is to slay vampires.
The Vampire Knight 日本动漫 series is an adaptation of the Vampire Knight 日本漫画 series. The 秒 season is titled Vampire Knight: Guilty. It consists of twenty-six episodes, with thirteen episodes in each season.