[quote=@Classified]
Is the position of Principle open, can I make my other character the principle but he also teaches a class...not sure what yet but I  just had an awesome idea to make him the paternal grandfather of my character Aspen
[/quote]

No. The reason the principle has '???' next to their name is that, literally, no one actually knows who Herculean's principle is, besides the vice-principle. The other teachers and the students have only spoken to them through a transmission where no face is shown as the principle's voice is distorted, similarly to how L from [i]Death Note[/i] was at the beginning.