Tokita
^{Tokita is the butler for the Itoshiki Family. In reality, Tokita is actually supposed to be the true heir of the Itoshiki family riches and all the siblings be his servants, but with that power he instead becomes the servants to all the siblings due to just liking being a butler.}

Arai Chie
^{Arai Chie is a counselor at the same school of class 2-He. Her name means wisdom. She's recognized through her short hair and her sexual prowess. When Zetsubou sensei is absent, she fills in for him.}

Jinroku
^{Jinroku is a colleague of Zetsubou sensei's at the same school of class 2-He. He doesn't appear very often, but when he does it's often for his ongoing gag about his troubled past as a yakuza member.}

Ikkyu
^{Ikkyu is an old one-day friend of Zetsubou sensei. He loves everything old and from time to time barges in on Nozomu's classes.}

Tane Kitsu
^{Tane Kitsu is the older sister of Chiri Kitsu. Her name derives from the word 'Kittanee', which means dirty. She's recognizable due to being the complete opposite of her sister; being a complete slob and bringing dirt through her mere presence.}

Merus Father
^{This is Meru Otonashi's dad. He would do anything for his daughter, which leads to him spoiling and defending her to Meru's annoyance.}

Koji Kumeta
^{This is Koji Kumeta, the authors self-insert.}

Maeda Kun
^{This is Maeda Kun, the authors assistant self-insert. His face and character appears randomly throughout the show.}

Background Creatures
^{These two photos are just recurrent background gags. The one on the left is the emperor penguin and the one on the right is the stick dog.}