Itoshiki Nozomu

Japanese name:	糸色 望
Nickname:	Zetsubou-sensei, Momoiro Kakarichou

The main character, a high school teacher and the youngest son of the Itoshiki family. He always wears a hakama and kimono abroad, preferring flippant casual western clothing in his hometown. When his name is written horizontally it resembles zetsubō, befitting his extremely negative, paranoid and pessimistic attitude. He often shouts "I'm in despair!" and attempts suicide several times, though rarely with serious intent. Most of the main girls seem to have feelings for him but only because they misunderstand what he said to them (during the episode about them). He is based upon the main character from Dazai Osamu's No Longer Human, which is both Nozomu's and the author's favorite novel.

MyAnimeList