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Sho's Group
Sho Takamatsu
The noble and brave leader amongst the children at Yamato Elementary School.
- Action Survivor: Sho isn't much of a fighter, but he does know how to solve most potential crises that come to the school, and almost always comes up with good solutions regarding the resources needed for survival.
- Actual Pacifist: Sho rarely ever resorts to violence, believing that it is inhumane. He even believes someone as cruel as Sekiya doesn't deserve to be killed, believing that doing so would make everyone else just as bad as he is.
- Big Good: Sho is the leader amongst the children, is perhaps the most selfless and sane person amongst the group, and always pushes for what's best for everyone.
- Brilliant, but Lazy: Sho is incredibly smart and resourceful for his age, the only problem is that he doesn't care much for his responsabilities at first, resulting in him doing poorly at school.
- Cassandra Truth: During the beginning of Volume 8, about half of the school come to believe that Sho was the one responsible for the dynamite blast, despite his inistance that he didn't do it. This causes a good chunk of the school to lose their trust in him, and avoid talking to him altogether. This happens to him again towards the end of the manga, when he lies about being the culprit to lead the students back to the school, though this time everyone wants to kill him.
- Jerk with a Heart of Gold: Despite being a selfish, snarky boy at the start of the manga, and being somewhat overbearing and entitled in several scenes after becoming leader, he still shows himself to be noble and brave.
- Kid Hero: Despite being a sixth-grader, Sho is a hero in every sense of the word. He legitimately cares about the lives of others, does the best he can to keep everyone sane when times seem tough, constantly risks his life to save others, and even suggests that killing Sekiya would make everyone just as bad as he is, instead opting to have him locked up.
- The Leader: He becomes the official prime minister of the school after an election with The Princess.
- My God, What Have I Done?: Sho is regretful of saying that he's leaving his mother forever, espescially now that there's no hypothetical way that he can make it back home.
- Wise Beyond Their Years: Many of the children display this, but this is espescially true for Sho, who knows how to act responsible and adult in many situations.
Yu (Yuichi)
A three-year-old boy who walked amongst the school grounds as it exploded as he was waiting for Sho, causing him to get transferred along with the rest of it.
- Annoying Younger Sibling: Though they aren't related, Sho sees him as this, as they share a sort of brother-like relationship.
- The Cutie: Arguably the most innocent of all of the children. It espescially helps that he's the youngest of them.
- Greater-Scope Paragon: Subverted. As he is being sent back to the present, Yu makes a promise that he'll grow up to be an influential figure that prevents the Earth from becoming the barren wasteland it is in the future.
- Improbable Infant Survival: Despite being only three-years-old, he's one of the handful of children that survives by the end of the manga.
- Tagalong Kid: Yu, the preschooler, doesn't really do much in the story, outside of giving Sho hints about where they are, and being sent back to the present in order to fix the future. Despite this, he is always seen with many of the kids in the group.
Otomo
- The Ace: Otomo is one of the school's star students, having some of the highest grades and being a star athlete.
- Anti-Villain: Otomo was responsible for the school being transferred to the future in the first place, which he did not intend. He inteded to blow up the school due to the pressue of being a class representative and having the top grades. Otomo regretted this so much that he decided to shift the blame on Sho instead, and the more guilty he felt, the worse he treated him. In the end, he makes ammends for this, and tries to help out with getting the school back to the present.
- Broken Ace: The pressure of being class representative and needing to have the highest grades is the reason he tried to blow up the school.
- Face–Heel Turn: Turns against Sho and starts a revolt against him.
- Guilt Complex: After he attempts to blow the school up, causing it to go to the future, he becomes so guilty that he decides to shift the blame on Sho. Because of this, the more guilt he felt, the worse he treated Sho.
- The Starscream: Otomo attempts to overthrow and mutinizes Sho on multiple ocassions.
Sakiko Kawada
Nishi Ayumi
Emiko Takamatsu
- Good Parents: Emiko dearly misses her son, even after the heated arguement that they had. Realizing that he had been sent to the future, she tries to help him and his group by leaving around supplies for them to pick up.
Ikegaki
Hata
Yoshida
Yanase
Yoshikawa
Mari
Kyoko
Yamamoto
Shinichi
Other Students
Otsuki
Ishida
Shibata
Akabane
Tashiro
Nagata
Tatsumi
Ando
Seino
Uemura
Hatsuta
Murata
Staff Members
The Principal
Mr. Sakura
Ms. Tanimura
Ms. Arakawa
Mr. Asai
Villains
Kyusaku Sekiya
The former school lunch delivery man who turned into a cruel tyrant when he finds himself stranded in the future with the school's students. Under the belief that children are exploitable "beasts", he routinely abuses, threatens, and/or kills them to fulfil his desires.
- Ax-Crazy: Sekiya is a very unstable man that is prone to violence, and often uses it to threaten people when things do not go his way. This is espescially evident when he picks up a gun that Hata was using, and tries to shoot at the other children running down the hallway.
- Big Bad: Sekiya is the most persistent threat that Sho and the rest of the gang must face. He is also hellbent on ruling the entire school, as he is the only adult remaining after Mr. Wakahara killed all the other adults, and wants to hoard all of its supplies to be its sole survivor.
- Child Hater: Sekiya has a strong dislike for children, seeing them as exploitable "beasts".
- Children Are a Waste: One of Sekiya's rationalizations for being abusive towards all of the children. He views all children as non-human and easily exploitable.
- From Nobody to Nightmare: Sekiya claims that prior to the school being moved to the wasteland, he was constantly mocked by the students and other staff members due to his job. Afterwards, he becomes one of the most dangerous threats in the entire manga series.
- It's All About Me: Sekiya believes that he is entitled to all of the sordid actions he had commited in the story for being an adult, and for his low paying job as a school delivery guy.
- Karmic Death: Sekiya is strangled to death by the arm of the school thief, which was transported to the wasteland due to him being on the premises and outside of it simultaneously, when he tries to kill off the children one last time.
- Motive Rant: Sekiya rants about how he was constantly made fun of by others and how crappy his job was, stating that this is his primary motive for wanting to rule the school.
- Obfuscating Insanity: Subverted. After he gets attacked by a centipede-like monster, Sekiya inexplicably starts acting like a toddler, doing things such as putting stones in his mouth, making animal noises, and riding on Yu's tricycle. When he is pushed down the stairs, he goes back to his senses, but he pretends to still be insane in order to catch the children off guard.
- Sadist: When he makes a group of children cry after threatening to kill them, all he does is order them to cry some more, and demand that they respect him.
- The Sociopath: Sekiya refuses to be held accountable for his actions, views children as exploitable beasts, and even harms many of the staff members before they are killed off.
- They Call Me Mr Tibbs: Sekiya insists to all of the children that he threatens to be called Mr. Sekiya.
- Would Hurt a Child: Many, many instances:
- He holds one child who failed to get away from him hostage, and threatens to kill them in front of all of the staff members
- He threatens to kill Yu if the rest of the school doesn't follow his orders.
- You Monster!: Sho calls Sekiya out on throwing Yu towards an unidentified creature that was scurrying about the forest. Sekiya only backs this up by stating that he had the right to do so, as he is the only adult in the group.
"The Princess"
The infamous leader of a gang, feared by much of the students of the school. When the school is stranded in the future, she tries to rule over it when Sho was supposedly deemed dead.
- Arc Villain: Of Volume 3, where she competes with Sho over leadership of the school. Depending on how you interpret it, she may also serve as the Greater-Scope Villain of Volume 10, since she directed the school to the amusement park to begin with.
- Ax-Crazy: While not on the same level of this as Sekiya, her propensity for wanton violence and tossing out threats here and there just to have her way with everything - often with little to no provocation - puts her in this territory.
- Cold-Blooded Torture: The Princess and her goons strip a boy naked and stomp on his groin several times, all because he questioned her ability to rule. The Princess also orders another boy's fingers to be broken.
- Despotism Justifies the Means: Her modus operandi. In one of her dialogues she claims she is harsh to the students so that she can help them survive. It rings hollow when her barbaric and reactionary treatment of them isn’t fruitful to anything; and it’s apparent that she only wants to rule over the school so that she can abuse whoever she wants, however she wants, and whenever she wants.
- Everyone Calls Him "Barkeep": The Princess is never referred to by any other name, though some also refer to her as "The Queen".
- Evil Counterpart: To Sho Takamatsu. Much like Sho, The Princess is an unruly child that doesn't take kindly to established rules. Though, unlike Sho, who takes the role as leader to protect everyone else at the school, the Princess only wants to enforce her own agenda onto the school, and torture those who step out of line.
- Evil Is Petty: Outside of wanting to rule the school under tyranny, The Princess also swears a lot, constantly psychologically and physically abuses people that question her, or anyone that crosses her path, and does literally anything to make her subjects miserable.
- Karmic Death: After leaving the school with her clique following losing the election, The Princess comes back to the school malnourished. She chokes to death on some water that another student gives her after drinking it too fast.
- Lack of Empathy: To further demonstrate how sociopathic she is, when one of the toddler students inadvertently commits suicide by jumping off one of the school buildings (believing he could fly) - complete with images of his bloodied, mashed-in face, she doesn’t react with horror, surprise, or guilt, but uses the incident as an opportunity to smugly proclaim that the younger students can die for all she cares because they’re “useless”.
- The Rival: She is the most prominent antagonist in the story besides Sekiya, competing with Sho for leadership in her first appearance, and endangering the entire school by directing them to an abandoned amusement park in her second.
- Sadist: Aside from using extreme physical force to impose her authority over others, it’s apparent that she also engages in it for sick jollies.
- They Call Me Mr Tibbs: The Princess specifically wants to be called "The Princess" over "The Queen", as she isn't elderly.
- Would Hurt a Child: The Princess' whole deal is to torture any of the students at Yamato Elementary School that step out of line. She shows how needlessly violent she can be when she smacks Yu, a toddler, across the hallway.
Hatsuko & Tomeko
Mr. Wakahara
Scar Kid
A student from Yamato Elemetary School with a scar over his eye.
- Arc Villain: Of Volume 5, where he tries to resort to fear-mongering in order to fulfil his sadistic desires.
Future Humans
A species of creatures that had replaced the human race in the future world that Sho and his friends find themselves in. They are implied to be a large evolutionary leap in humans when the population had grown too large.
- The Dreaded: An old slideshow tape that the Future Humans own implies that humanity was worried about the existence of the Future Humans, espescially evidenced when a group of people gather around a plot of land where one of the first specimens have been found to have been buried underground, utterly shocked by the sight.
- Evil Counterpart: The Future Humans appear to be a reflection of what Sho and his group would have become had they lost any and all humanity, being a group of monsters that rely purely on survival of the fittest, does not value friendship of any kind, and kills off anyone who steps out of line. The fact that the children eventually resort to cannibalism towards the end of the manga highlights these differences in retrospect.
- Greater-Scope Villain: They were the next step in human evolution that society had apparently greatly feared. As a result of this, humanity had supposedly distanced themselves from nature and, in their own words, passed around "bad genes" when they found cures for diseases such as cancer. The manga also implies they, alongside the increasing number of natural disasters, were at least partway responsible for the exctinction of mankind, as evidenced by the numerous skeletons found around the subway.
- Hive Mind: The entire society of the monsters is a hivemind; at which point individualism is punishable by death.
- The Social Darwinist: The entire hivemind are under the belief that their species is inherently better than any other. They even believe that the reason why humans went extinct was because they weren't as advanced as them. Additionally, they will kill any of their kind who practices any form of individualism.
- Spider People: The Future Humans look like giant scaly spiders, and can shoot a web-like substance from their mouths. Besides their vaguely human faces, they bear little resemblance to people, however.
Robot Host
Basai
