Tsugumi is a hitwoman who was raised and trained by Claude of the Beehive Gangsters.Tsugumi is originally introduced as a guy who transfers to Chitoge's class, and has orders to protect her from Raku, whom she thinks forced Chitoge into the relationship. She and Chitoge are childhood friends; she tries to keep a ten year old promise of becoming strong to protect Chitoge. However, after Raku treats her nicely, she begins to develop some feelings for him, even though she is too stubborn and embarrassed to admit it. In America, her assassin code name is "Black Tiger," who had a rivalry with "White Fang." She does well academically, having ranked next to Chitoge on a yearly exam. Later when she learns that Chitoge and Raku had been having a fake relationship from the start for the reason of only to stop their families from fighting. She investigates their individual feelings for each other to know if she has a chance. She comes to the conclusion to give up in order for Chitoge to be happy and one day when alone with Raku in the classroom, she places her hands over his ears and confesses her love so that he doesn't hear it. She later helps Chitoge and Raku come to terms to their mutual feelings. In the epilogue, she becomes Chitoge's exclusive model. (Source: Wikipedia)
Sakura's wandering monk uncle. Cherry's real name is Sakuranbou, which literally means “cherry” in Japanese. But because the word's kanji can be read to mean "deranged monk," a phrase that is quite accurate in describing him, he prefers to be called by the English word. Cherry has amazing spiritual powers (or so he claims) and he often predicts doom for Ataru (no great feat). He has a habit of popping up out of nowhere, often from very strange places. His ugly face and very short stature are frequently used for comedic effect. Cherry has made a vow of asceticism, living in a tent in an empty lot not far from Ataru's house. However, this vow apparently doesn't apply to food, as he is an enormous mooch. Rei Hino of Sailor Moon's Grandpa looks a lot like Cherry. SOURCE: http://en.wikipedia.org/wiki/Sakuranbou#Sakuranbou
An employee at the Fate Production Bureau (é�‹å‘½è£½é€ 管ç�†å±€, Unmei Seizou Kanrikyoku?) which makes doorknobs to the Dream Realm. He wears a rabbit costume which allows him to travel feely to and from subspace. Debuting late in the series (Vol. 31), he still plays in important role. He ends up falling in love with Shinobu after she finds him passed out and hungry in the street and gives him some food. Eventually he and Shinobu become a couple. (Source: Wikipedia)
Father of Ryouko and Shuutarou who is the head of the Mendou Corporation.
Due to her isolation from men and from meeting Ataru, she develops a fear of men. However, she loves her older brother like a lover and Mendou because they care for her.
Head teacher of class 5-2 of Doumori Elementary, Ritsuko Takahashi is considered the madonna (term for "beautiful unmarried woman") of the school. She is very serious and dedicated to her job as a teacher, but at the same time is very edgy when it comes to the unknown, in particular the spirits and youkai the school constantly encounters. Unfortunately, her nature is a double-edged blade for Nube: while her beautiful exterior makes him desire her and all the things he wants to do to her, her oversensitive nature towards the supernatural makes him tease her all the time about it... and face her wrath as a result. At the start of the series, Ritsuko-sensei is probably the last person Nube would ever end up with in a relationship. Every time he tried to win her heart, she would knock him away due to being too scared of his spiritual obsessions. But as the series progresses, she slowly gains the courage to face the youkai menaces... and as a result, slowly realizes how Nube is helping all those in need... and even begins to appreciate what he does both for students and all those he assists. But while her feelings slowly makes her try to become closer to the male teacher, it ends up attracting scorn from Yukime, the yuki-onna who sees herself as the one who is the teacher's true love. The love triangle between the two teachers and the spirit girl becomes a key theme in the later part of the manga, as Nube is forced to decide between feelings and emotions and figure out which he wants to spend his life with. (Source: Wikipedia)
One of Ataru's teachers. A sad, middle-aged man, whose only interest is to teach at Tomobiki High, but fails due to the constant interruptions during class, when the classroom itself is not destroyed by Lum, Ten or Shinobu. His name means "Mark of the Hot Springs", and he usually wears a shirt with hot springs on it.