Divus Crewel

He is a teacher at Night Raven College, where he instructs classes such as Alchemy. He also serves as the homeroom teacher for Class 1-A, which includes the protagonist and Ace.

He usually refers to students as "puppies," but calls those who make a ruckus "mutts." He treats students exactly like dogs, praising them with "Good Boy" and scolding them with "Bad Boy." His motto is to "discipline them until they stop biting back."

While he has his "quirks" (mostly regarding instruction), many students trust him. It is said that he will teach students who struggle with academics—like Deuce—patiently until they understand.

According to the Headmaster, he possesses an excellent aesthetic sense. In fact, he reportedly worked in the apparel industry at one point. He is sensitive to current trends but also takes an interest in vintage fashion.