Board Thread:General Discussion/@comment-6986530-20170327230407/@comment-7342272-20170418200937

They're implying that because Behemo referred to Held as a professor, then he must be Professor Hazuki, who is also most likely Sickle.

Which is highly unlikely since... y'know... Held and Sickle have existed separately since like, ever. Even back when they were professors.

So yeah, I'm pretty sure what we're supposed to pull from MoN about this is that Professor Hazuki = Sickle, and from previous novels we know Held is a professor, too. That's all they are. They're both professors. At the same time. Colleagues.