Eitarou Sakuma

Described as being "Most stuff unknown Part-time teacher here and also very skilled magician." He is an easy-going teacher that helps out Takuto and Suzuho. He is clearly a powerful magician, as shown when he easily broke the barrier that Miyabi and Sinclavier erected and even overpowered them. He is also highly knowledgeable on the use of magic, since he was able to summon a black demon lord to do his bidding. However, his personality and behavior are rather perverted, and he is an unabashed otaku, who often joins in with Professor Frankenstein perverted schemes.

He appears to prefer the paws of animal girls to the point that he even made battle gloves for Tanarotte in the shape of cat's paws, and maid outfits which is why he dressed up Eineus, Miyabi, and Sinclavier as maids. Eineus has stated that he spends more time on his assorted hobbies than on his actual work. There is some indication that he is other than human and is, in fact, Samael, the Angel of Death; when confronting Gabriel and Agaliarept and his identity demanded, he responds simply with his name ("SAkuMA EitaROU" with emphasis, "SAMAEROU" with the L-as-R of Japanese).

After a moment of repetition, Agaliarept says "You couldn't be...!" and Gabriel chimes in with "Samae..." Sakuma goes on to prove capable of defeating the both of them, and seems dismissive of the possibility that beings of their level could do anything to truly harm him, stating "if you want to kill me, get Lucifer to do it".