Start with a B
Not a lot of people knew why Silver had suddenly decided to become a teacher. Usually due to the duties of a vampire knight, one was too busy to do such a thing. For some reason though, after learning about the events of her brother, she had decided to become a teacher after coming back from earth.
For her, it was something to take her mind off. She actually realised she quite enjoyed teaching back at the military base and thought she would give it a shot here.
But what was even more surprising for the others, was the fact that Sliver had decided to become a normal teacher. Her rank as vampire knight meant if she really wanted to, she could be teaching the direct descendants of the thirteen families, the next potential leaders. They often got taken out of class and were given special lessons on top of everyone else that the others weren't allowed to access.