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)
Akane's friend and rival. Student of class 3-B.
Haruka's younger sister, She initially sees both Takayuki and Mitsuki as older siblings until she finds out they have been seeing each other behind Haruka's back. While Haruka is in the hospital, she visits every day since there is no one else that can keep her company, even if Haruka is in a coma. This shows just how much she loves her older sister. She, like Mitsuki, is a powerful swimmer in her own right, but feels as if she can never match Mitsuki. Her intense hatred towards Mitsuki after the accident can be attributed to the feeling of personal betrayal by someone she considered an idol for throwing away her (Mitsuki's) talent and dreams as well as Mitsuki's betrayal of her sister by her sexual relationship with Takayuki. She learns to move on in life and becomes a top swimmer in Japan. (Source: Wikipedia)
Birthday: January 25 Blood type: O Matsuri, nicknamed "Mats" in the manga, is an eleven-year-old glasses-wearing girl with a pet ferret named John, and is depicted as having a very timid personality in the story. She is often the subject of Miu's teasing and can resort to crying and hiding behind Nobue. She is one grade below Chika and Miu, in the same class as Ana, with whom she quickly became friends. Matsuri discovers that Ana can speak Japanese fluently and helps her hide both her Japanese language skills from the rest of their class and her lack of English language skills. While she has gray hair in the anime, her hair is white in the manga.
"Spiral Shell" Maki is an assassin working for the Seto Group, as well a devoted friend of Sun. She, like G�zabur� Seto, dislikes the idea of "losing" Sun to Nagasumi, and will often distract Sun with sweet talk in order to fire her shell gun at Nagasumi. She also thinks that Nagasumi and Luna should be together. (Source: Wikipedia)
Shark is a member of Seto Group initially summoned by Sun's father during the Michishio family's initial visit to the Seto family home to attack Nagasumi. In human form, he later becomes Nagasumi's P.E. teacher. By his thinking, the sooner Nagasumi dies, the sooner everyone can return home. He often acts on this logic, trying to eat him. According to him, the answer to all problems is by eating the person causing the chaos, be it Sun's or Lunar's fans or a suicide bomber from his own group. he often seen sleeping and he can transform in only a sharkhead, but also a whole shark as seen when he's in the sauna. ( partly wikipedia )
Saru's little sister who appears in the original manga and the OVA series. After being saved from a burning movie theatre by Nagasumi, she calls him "Nagasumi Willis" after "Bunta Willis" an action hero that parodies Bruce Willis and Bunta Sugawara. (Source: Wikipedia)