The following is a list of characters from the series C3 novel series, also known as .
Main characters
A male student at Taishu High School. His father has a habit of sending him Cursed artifacts to remove the curses within, as their home is in a blessed location, a focal point for positive energy which gradually removes curses, and thus makes him immune to any curses. Due to the fact that his mother was never seen or mentioned in the series and his father is traveling, he developed a talent in cooking and is highly independent. He has a very stubborn but friendly personality, and does not hesitate when it comes to protecting his friends. Haruaki is somewhat aware of all the girls' feelings towards him, but never acts upon taking steps towards a serious relationship with any of them.
A girl with a Cursed Tool, whose full name is Fear-In-Cube, a torture device resembling a solid metal cube. Fear-In-Cube has 32 torture capabilities which include an Iron maiden, and a Guillotine among other things. Fear was developed during the height of the Inquisitions, and has caused countless people's agonizing deaths to the point where she risks going homicidally insane upon hearing someone scream in pain. Eventually she developed a curse of her own, causing anyone who owns her to go insane, driving the owner to want to use her to torture people and revel in their pain and screams. Due to her extended time in the depths of a Spanish castle Fear has also developed animosity for spiders, as they would build cobwebs around her original form. Out of disgust at her past, Fear prefers to stay in human form. She regards Haruaki as her owner, and her anxiety is eased by his assurances that her curse can not affect him. Fear's torture abilities are over time neutralized by things called indulgence disks which hare found in other cursed tools. She appears to have a developing crush towards Haruaki but responds to him in a Tsundere type of way when she gets shy. Fear's favorite catchphrase is "I'll curse you", and has an addiction to rice crackers.
A long resident at the Yachi compound, Konoha is also a Cursed Tool in the true form of a katana. In human form, she still retains her powers of slicing clean through objects, which are her sword characteristics. Her curse towards her owner differs between adaptations but does not play an essential role in the story due to Haruaki's immunity to curses. Konoha's status as a Cursed Tool has almost been lifted, but when she sees blood for an extended period of time a relapse can occur towards a blood-thirsty personality with blue hair and eyes similar to Fear. Konoha tends more though to faint at the sight of blood as a result of hypnosis that was self induced in order to keep her blood lust from overwhelming her. She also wears special glasses to help block her vision of too much blood. Little is known of her history before the start of the story other than she is a childhood friend to Haruaki. He sometimes calls her "onee-san" (older sister) as he did when they were kids in order to obtain a special favor from her. To the outside world she and Haruaki are related cousins, and she goes to a different classroom than him. She doesn't get along well with Fear whom she refers to as a "child", and is jealous when she gets too close to Haraki due to Konoha's crush on him. She is also aware that Kirika not only loves but is a rival for him.
Haruaki's classmate and the Student Council President. She is in possession of two Cursed Tools, one called Ginistrang's Love, and the other The River of Black Strings (or Tragic Black River). Both of these tools give her advantages in battle including the ability to not be killed by a fatal injury, though in exchange they come with terrible effects. She will die if she ever removes Ginistrang's Love which looks like a bdsm-style outfit, as for the other tool she satisfies the curse by using herself as a victim since the bondage suit will heal the injuries that Black River inflicts. Kirika feels disgusted with her body as she did not choose to have these cursed items placed upon her. She is also a reluctant member of a group founded by her older brother that has more than one name depending on the adaptation. This group studies and researches Cursed Tools as the ultimate mysteries to explore. She has a crush on Haruaki, and often competes with him over whose cooking is better during lunch period. He later finds out about her Cursed Tools, and what she must do in order to satisfy the curse of Black River. He isn't bothered by it though, and the trust further strengthens their relationship. Kirika's catchphrase is "Absolutely ridiculous!" which she uses on more than one occasion.
A Cursed Tool in the form of a doll who has recently returned to Haruaki's house. She is a Japanese doll with extendible hair, and chose the 'e' kanji of her name to give the impression of "pretty as a picture". Kuroe has a very friendly and calm personality but usually seems emotionless, those that know her well though like Haruaki, can tell if she is feeling a particular emotion. She can freely control her hair like tentacles or hands for many purposes such as moving things or healing others using her life energy. She recharges by running a salon where she cuts peoples hair and then feeds on the residual life energy inherent in the cut hair after closing, partly to keep her life energy up and partly because she finds the hair delicious. Due to the trust and thanks from her customers and fellow shopkeepers she has completely removed her curse. Her original curse was that she would attempt to steal her owners' life energy at night by cutting off bits of their hair, and absorbing it until they died. It is shown that Kuroe finds amusement in her practical jokes and playful flirting towards Haruaki.
Taishuu High School
The eccentric superintendent of Taishuu High School who wears a gas mask over his face for unknown reasons. Gabriel constantly spins different stories as to why he wears the mask, but Fear and Shiraho just think he is perverted. Volume 8 of the Light Novels reveals the reason he wears the mask along with the fact that he feels nervous without it after having worn it for so long. He is a busy person, allowed the freedom to do many things besides show up to run the school. Usually he is off on travel and rarely in the office. When first seen in Vol. 2 he had only gotten back to the school at 11:00 am, and had to catch a flight on another trip that afternoon; he would return in a week. His interest is in collecting what he thinks are cursed objects, however he claims that Haruaki's father is far ahead of him in identifying them. He is currently looking for a way to heal and bring back to life a destroyed Cursed Tool due to a past incident with the Draconians. This prompts him to go on numerous trips seeking Cursed Tools but usually getting junk as he can't identify whether something is a Cursed Tool or not. Due to the incident his health is poor so while he can do one strong attack he is completely wiped out and would be unable to do anything other than walk away after the one attack. Zenon and her sister have been his subordinates since before the incident. He is very skilled with throwing things and seems to have a lot of clout and pull with important people in the city.
The superintendent's secretary who manages the office when he is absent. She has a deadpan personality. However, she has a soft spot for cute things, as her cellphone ringtone is a jingle in the series' fictional children's show called "Meow Meow Paradise Hell". She has a strong interest in cute things, especially outfits, whether for herself or someone else (like Fear or Sovereignty) and tries to hide this from others. Unfortunately for her, her figure and appearance is better suited for mature, serious, business type outfits rather than cute things. She is skilled with throwing knives and was also involved with Gabriel's incident with the Draconians. A running gag involves her letter of resignation. In the first example, after the trunk she had custody of proved empty, Gabriel mused about docking her pay, but since he had a camera handy proposed taking a picture of her smiling instead. She then pulled a Letter of Resignation with intent to use it, and declared that her severance pay could be swinging her fist at him. Gabriel declared he was just joking, and she put the letter back in her pocket. She is aware of the existence of Cursed Tools along with the fact that Konoha, Fear and Sovereignty are Cursed Tools as well as Kirika's and Izoey's involvement with Lab Chief's Nation.
The procrastinating school nurse of Taishuu High School, who is Zenon's sister. Has developed her own method of fighting that resembles Drunken Mastery which makes it seem she is doing one thing while actually doing the exact opposite such as appearing to be withdrawing while actually attacking and vice versa. Likes to sleep and drink while finding any activity to be too bothersome and tiring. Although when need be she can actually be reliable occasionally such as giving Haruaki a 10,000 Yen bill, calling a taxi and giving him Kirika's address after she fainted. Like her sister, she is aware of the existence of Cursed Tools along with the fact that Konoha, Fear and Sovereignty are Cursed Tools as well as Kirika's and Izoey's involvement with Lab Chief's Nation.
A former talented performer in a famous theatrical group whose family owns an antique shop. She is lonely and cold-hearted and likens herself to a 'doll', but after Sovereignty addressed her during one of her wanderings in the antique shop she takes a liking to him, asking from the first "Can dolls fall in love?". In the novel, volume 2, she is first seen at the door of an empty classroom. Haruaki, Konoha and Fear mistake her for Sovereignty, and she chooses to use that mistake to her advantage. She was found out when Haruaki and Fear check her medical form at the school nurse's office. Shiraho was enrolled but never attended classes at Haruaki's high school up until Sovereignty got his/her Killing Organ destroyed. After that, as part of the punishment for all the trouble they caused she has to attend school normally. While her grades are terrible she is a top class actress who can capture an audience's attention with her exceptional performance even if she had no time to prepare or rehearse beforehand. Her personality is still cold from being treated as a doll by her mother to perform on stage, being highly praised for performances she put minimal effort into, and talks like she is a doll and humans are beneath her. Although she has lightened up somewhat and able to talk to Haruaki's group fairly normally, it's still with scathing remarks and treating Haruaki as a miserable excuse for a human whose only value to the world would be dying. She still loves and lives with Sovereignty despite the curse still being present. Even though Sovereignty's curse makes the owner fall in love with him/her she doesn't want to relinquish ownership so her love for Sovereignty won't decrease at all in case some or all of her love for Sovereignty is from the curse. She is one of the few female characters of Haruaki's age group not head over heels in love with him.