I did a quick search on wikipedia>Student Council Chairman (生徒会長, Seitokaichō?)>A student chosen by Itsuki's "method" and hired by the Agency to play the part of the archetypal nemesis to Haruhi, as yet another attempt to relieve her stress. He attacks the Brigade, usually on the grounds that it is not a legitimate club, using the school rules. When acting as Haruhi's nemesis, he wears glasses and acts cold and polite. When Haruhi is not present, he drops this façade, removes his glasses and sometimes smokes cigarettes. He has noted that he is growing accustomed to his role and that he enjoys wielding power. His name remains unknown.