The greatest teacher of all time. (An ex-student, who is now a mathematican )
As a man he must be borderline insane. He's known for his dubious dress sense and showering the floor with skin dust everytime he scratches his legs, as well as his irratic temper. But as a teacher and a mathematician he's as close to a genius as I've ever met. Its obvious why he stays away from lower school, but A level maths students would be lost without him.
Great teacher, knows everything to do with maths. Can work out the most difficult mental maths.