The Abnormals are students who possess overwhelming capabilities such that they are dominated by that aspect; they are unable to relate to normal people, and typically have a superiority complex; Medaka herself is one of these.
She enjoys helping others and is determined to finish any task handed to her, rewarding herself with a pot of flowers, and hoping that one day she can look outside the council window to see the academy full of flowers.Ch.
Medaka's brother, Maguro, takes special interest in him because no matter how much he is discouraged or fails, he stands back up.
Zenkichi has vowed to protect Medaka ever since she was emotionally scarred after failing to help a classmate in middle school.
If standard human limits are applied though, Zenkichi has long since passed the line of a "normal"; for instance, when he caused a small earthquake with his stomp.
To remain by Medaka's side, Zenkichi accepts Ajimu's offer to become a main character by using the Flask Plan.
In order to defeat Medaka by becoming the next Student Council President, Zenkichi is given a specially made ability created by Hanten Shiranui: "Devil Style", an Abnormal ability that nullifies any coincidence, allowing Zenkichi to enter any venture without luck or the whims of fate interfering with it, thus making any endeavor completely fair.
He is now one of the only characters, alongside Youka Naze, Misogi Kumagawa, Najimi Ajimu, and Kamome Tsurubami, to possess more than one abnormality or minus.
Medaka describes Kumagawa as a compulsive liar who places no meaning in trust or doubt, while Hitomi Hitoyoshi considers him developmentally retarded.
Misogi Kumagawa describes Hitomi Hitoyoshi as his "first love", and apparently has a strange fetish for panties and adult women who look much younger than they are.
Despite his intensely negative attitude, his intentions appear to be ultimately good - Kumagawa wants to create an equal world and fight for the oppressed, but has insane and idiotic anime-related ideas about how to go about it.
He used to carry around a macabre stuffed rabbit as a child (which held his first screw) and as a middle schooler was shown to be capable of solving complex puzzles in seconds.
At some point he mostly sealed off the virtually omnipotent immortal psychopath Ajimu from reality, which led Medaka to mistakenly think that he had killed an innocent woman, and attack him in a fit of rage, resulting in him leaving the school.
Wounds he inflicts can be instantly cured as if they never were, because they were not, and people who can see can be made blind as if they had never seen, since they had not; it can also undo death making himself effectively immortal.
After Anshin'in's death at the hands of Iihiko Shishime, an unconscious Kumagawa comes across an afterimage of her, presenting him with two of her skills.
He later becomes student council president after Medaka's destruction of the moon and subsequent disappearance, though he made a bet with her that she would return.
Shortly after she joins the Student Council, she charges Zenkichi for accidentally seeing her changing and then again for insulting her, and one last time for saying she had a great body.
She develops strong relationships with the Student Council members, particularly Medaka and Zenkichi, after being encouraged by Yakushima and Tanegashima to make friends outside of the swim club.
Her ability can also be used as a form of echolocation, though Kikaijima must be accompanied by someone who can act as a receiver for the reflected sound waves, such as Medaka or Kibougaoka.
As a result of her past desire to acquire money, she is also capable of performing high-level calculations of probability for gambling purposes.
Many are involved with the Flask Plan, an experiment overseen by the Headmaster of Hakoniwa Academy to create a Perfect Human.
Recognized as the primary members of the Class 13, the Front Six consist of students whose abnormalities became refined and highly developed under the Flask Plan, mostly under the direction of Youka Naze.
The class consists entirely of Minuses: detached, traumatised, resigned, or pessimistic people, who can develop emotionally shallow attachments to anything or anybody that makes them feel a little better.
Centered around Misogi Kumagawa, their stated aim is to create an entirely equal society where nobody would possess any distinguishing special abilities, though they lack any sort of direction as to how to achieve the goal.
The majority of the chairmen of the various committees at Hakoniwa Academy are introduced as the opponents that the potential successors and the Student Council must overcome during Medaka's treasure hunt.
As the Chairman of the Enforcers, Myouri Unzen is also an opponent, who sets up a chess match: "Four Continuous Showdowns on the Boards: Casting Boat".
This committee is a group of students who are charged with enforcing school rules and regulations, viewing themselves as the upholders of justice.
Members of the committee are dedicated working within the shadows of the Student Council and the Enforcers and avoid unnecessary attention in order to be forgotten so to maintain their impartiality in regard to school affairs.
However, among the many middle school students who appear upon Medaka's summons, only five remain standing when Kumagawa brutally and bluntly disheartens them with his words.
When Kamome is invited as the suitor from the Tsurubami family, Medaka elects to take his place so she can decide for herself who she will marry.