Is it illegal for a vampire to be in a relationship with his or her guardian?
Vampires are not real. They are myth. Therefore there are no laws concerning vampires.
It is about 2 vampire girls Princess Vasilisa "Lissa" Dragomir and her best friend Rose Hathaway who is training to become a guardian. They go to a special vampire school in Montana named St. Vladimirs this is where Lissa meets Christian and Rose meets a guardian named Dimitri.Who is Lissa's guardian who helps her practice. But they can"t be together
It depends on the sort of relationship you mean. If you are suggesting friendship, then yes. If you are suggesting dating relationships, well, that's entirely up to your parents or guardian; only they know you well enough to say. If you are instead referring to a sexual relationship, then no; such is illegal.
The vampire academy books are about a vampire damphir called rose who protects her best friend lissa ( who is a moroi) from all the evil vampires ( The strigoi). Rose has sworn to be lissa's guardian through thick and thin. But she has fallen in love with a teacher who helps her train to fight like a proper guardian. she has lots of adventures aloong the way.