Vampire Knight is a shōjo manga with a theme that mainly revolves around romance and couples, such as Yuki x Kaname and Yuki x Zero. Many people who are fans of the series conflict about why a couple should or should not be together, with some even attacking a certain shipping while defending against the one they support the most. A shipping, as some people would know, is the pairing of two or more characters together in a type of relationship, often romantic.