Nijuuri Kai / Twenty

A member of "Thieves' Empire".
A crafty magician who uses various English words and attacks using cards. He is wildly perverted and constantly shows off his erect nipples to the chagrin of the students. His Toys allows him to disguise himself perfectly. Undercover as a teacher. His name is based after Edogawa Rampo's Fiend of Twenty Faces, Nijuu Mensou.