Well, there are a few teacher options he can choose from. There's the the headmaster, human, who teamed up with Caroline to start this school along with her daughters. There's the librarian, also human, who seems to be more skeptical of Alaric and Caroline's grand dreams for the world they want to create, but still clearly cares for the kids, and then there's the guidance counselor, a witch, who is rather friendly and charming, but mostly works one-on-one with students.

There are other various teachers, on various spectrums of the supernatural world, but these are the ones that the show has told me about so these are the options Dylan can choose from.