Age: 33<br /> Birthday: October 23<br /> Gender: Male<br /> Blood Type: B<br /> Height: 175 cm<br /> Weight: 68 kg<br /> Hair: Black<br /> Occupation: Chemistry Teacher<br /> Relatives: Suzu Chūma (daughter)<br /> <br /> Tetsuji Chūma (中馬 鉄治, Chūma Tetsuji), more commonly called Chū-san (チュウさん), is a chemistry teacher at Kaimei High School and the homeroom teacher for class 2-C. He is the faculty sponsor for the Sket Dan, a fact he often uses to get them to do things for him. He frequently creates odd potions and explosives which oftentimes backfire. <br />